@article{primo2020dissipative,
title = {Quasinormal-Mode Perturbation Theory for Dissipative and Dispersive Optomechanics},
author = {André G Primo and Natália C Carvalho and Cau{ê} M Kersul and Newton C Frateschi and Gustavo S Wiederhecker and Thiago Mayer P Alegre},
url = {http://arxiv.org/abs/2006.00692 https://link.aps.org/doi/10.1103/PhysRevLett.125.233601},
doi = {10.1103/PhysRevLett.125.233601},
issn = {0031-9007},
year  = {2020},
date = {2020-12-01},
journal = {Physical Review Letters},
volume = {125},
number = {23},
pages = {233601},
abstract = {Despite the several novel features arising from the dissipative optomechanical coupling, such effect remains vastly unexplored due to the lack of a simple formalism that captures non-Hermiticity in optomechanical systems. In this Letter, we show that quasinormal-mode-based perturbation theory is capable of correctly predicting both dispersive and dissipative optomechanical couplings. We validate our model through simulations and also by comparison with experimental results reported in the literature. Finally, we apply this formalism to plasmonic systems, used for molecular optomechanics, where strong dissipative coupling signatures in the amplification of vibrational modes are observed.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{Inga2020,
title = {Alumina coating for dispersion management in ultra-high Q microresonators},
author = {Marvyn Inga and Laís Fujii and José Maria C {da Silva Filho} and Jo{ã}o Henrique {Quintino Palhares} and Andre Santarosa Ferlauto and Francisco C Marques and Thiago P {Mayer Alegre} and Gustavo Wiederhecker},
url = {http://aip.scitation.org/doi/10.1063/5.0028839},
doi = {10.1063/5.0028839},
issn = {2378-0967},
year  = {2020},
date = {2020-11-01},
journal = {APL Photonics},
volume = {5},
number = {11},
pages = {116107},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{li2020proposal,
title = {Proposal for optomechanical quantum teleportation},
author = {Jie Li and Andreas Wallucks and Rodrigo Benevides and Niccolo Fiaschi and Bas Hensen and Thiago Mayer P Alegre and Simon Gröblacher},
url = {http://arxiv.org/abs/2005.08860 http://dx.doi.org/10.1103/PhysRevA.102.032402 https://link.aps.org/doi/10.1103/PhysRevA.102.032402},
doi = {10.1103/PhysRevA.102.032402},
issn = {2469-9926},
year  = {2020},
date = {2020-09-01},
journal = {Physical Review A},
volume = {102},
number = {3},
pages = {032402},
abstract = {We present a novel discrete-variable quantum teleportation scheme using pulsed optomechanics. In our proposal, we demonstrate how an unknown optical input state can be transferred onto the joint state of a pair of mechanical oscillators, without physically interacting with one another. We further analyze how experimental imperfections will affect the fidelity of the teleportation and highlight how our scheme can be realized in current state-of-the-art optomechanical systems.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{Fujii2020,
title = {Dispersion tailoring in wedge microcavities for Kerr comb generation},
author = {L Fujii and M Inga and J H Soares and Y A V Espinel and T P {Mayer Alegre} and G S Wiederhecker},
url = {https://www.osapublishing.org/abstract.cfm?URI=ol-45-12-3232},
doi = {10.1364/ol.393294},
issn = {0146-9592},
year  = {2020},
date = {2020-06-01},
journal = {Optics Letters},
volume = {45},
number = {12},
pages = {3232},
abstract = {The shaping of group velocity dispersion in microresonators is an important component in the generation of wideband optical frequency combs. Small resonators - with tight bending radii - offer the large free-spectral range desirable for wide comb formation. However, the tighter bending usually limit comb formation as it enhances normal group velocity dispersion. We experimentally demonstrate that engineering the sidewall angle of small-radius (100 $mu$m), 3 $mu$m-thick silica wedge microdisks enables dispersion tuning in both normal and anomalous regimes, without significantly affecting the free spectral range. A microdisk with wedge angle of $55^circ$ (anomalous dispersion) is used to demonstrate a 300 nm bandwidth Kerr optical frequency comb.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{Melo2020,
title = {Bright and Vivid Diffractive–Plasmonic Reflective Filters for Color Generation},
author = {Emerson G Melo and Ana L A Ribeiro and Rodrigo S Benevides and Antonio A G V Zuben and Marcos V {Puydinger dos Santos} and Alexandre A Silva and Gustavo S Wiederhecker and Thiago P M Alegre},
url = {https://pubs.acs.org/doi/10.1021/acsanm.9b02508},
doi = {10.1021/acsanm.9b02508},
issn = {2574-0970},
year  = {2020},
date = {2020-02-01},
journal = {ACS Applied Nano Materials},
volume = {3},
number = {2},
pages = {1111--1117},
abstract = {The desire to reproduce vivid colors such as those found in birds, fishes, flowers, and insects has driven extensive research into nanostructured surfaces especially because of their high spatial resolution. Using a periodic silicon-patterned structure coated with aluminum, we combine two distinct and yet interconnected effects to produce bright and vivid color surfaces. A genetic algorithm optimization process was used to fine-tune both the diffraction and plasmonic effects to obtain reflective color filters for the red, green, and blue colors. The obtained structures are suitable for displays, image applications, color sensors, and optical filters.},
keywords = {color filters, diffraction, metamaterials, nanophotonics, plasmonic, structural colors},
pubstate = {published},
tppubtype = {article}
}
@article{Benevides2020,
title = { Ar/Cl 2 etching of GaAs optomechanical microdisks fabricated with positive electroresist },
author = {Rodrigo Benevides and Micha{ë}l Ménard and Gustavo S Wiederhecker and Thiago P {Mayer Alegre}},
url = {https://www.osapublishing.org/abstract.cfm?URI=ome-10-1-57},
doi = {10.1364/OME.10.000057},
issn = {2159-3930},
year  = {2020},
date = {2020-01-01},
journal = {Optical Materials Express},
volume = {10},
number = {1},
pages = {57},
abstract = {A method to fabricate GaAs microcavities using only a soft mask with an electrolithographic pattern in an inductively coupled plasma etching is presented. A careful characterization of the fabrication process pinpointing the main routes for a smooth device sidewall is discussed. Using the final recipe, optomechanical microdisk resonators are fabricated. The results show a very high optical quality factors of $Q_textopt>2times 10^5$, among the largest already reported for dry-etching devices. The final devices are also shown to present high mechanical quality factors and an optomechanical vacuum coupling constant of $g_0=2pitimes 13.6$ kHz enabling self-sustainable mechanical oscillations for an optical input power above $1$ mW.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@inproceedings{Carvalho2020,
title = {High-frequency GaAs bullseye optomechanical resonator},
author = {Natalia C Carvalho and Rodrigo Benevides and Micha{ë}l Ménard and Gustavo S Wiederhecker and Newton C Frateschi and Thiago P M Alegre},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2020-STh1R.5 https://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2020-STh1R.5},
doi = {10.1364/CLEO_SI.2020.STh1R.5},
isbn = {978-1-943580-76-7},
year  = {2020},
date = {2020-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
pages = {STh1R.5},
publisher = {OSA},
address = {Washington, D.C.},
series = {OSA Technical Digest},
abstract = {We fabricated and measured a GaAs bullseye resonator able to operate above 3 GHz when coupled to whispering gallery optical modes. Our large phononic bandgap allowed us to observe the symmetry break caused by the material anisotropy and obtain optomechanical coupling rates above 30 kHz.},
keywords = {Electron beam lithography, Gallium arsenide, Material properties, Resonant modes, Tunable lasers, Whispering gallery modes},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{Rodrigues2020,
title = {High-Harmonic Synchronization of Optomechanical Oscillators},
author = {Caique C Rodrigues and Caue M Kersul and Michal Lipson and Thiago P M Alegre and Gustavo S Wiederhecker},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_AT-2020-JW2B.27 https://www.osapublishing.org/abstract.cfm?URI=CLEO_AT-2020-JW2B.27},
doi = {10.1364/CLEO_AT.2020.JW2B.27},
isbn = {978-1-943580-76-7},
year  = {2020},
date = {2020-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
pages = {JW2B.27},
publisher = {OSA},
address = {Washington, D.C.},
series = {OSA Technical Digest},
abstract = {We experimentally demonstrate injection locking of an optomechanical oscillator driven at multiple harmonics of its fundamental frequency. The measured Arnold tongues show strongest synchronization when driven at even harmonics.},
keywords = {Coupled mode theory, Extinction ratios, Injection locking, Optical force, Oscillators, Quantum noise},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{Primo2020b,
title = {Non-Hermitian Optomechanics},
author = {André G Primo and Natalia C Carvalho and Cau{ê} M Kersul and Gustavo S Wiederhecker and Newton C Frateschi and Thiago P M Alegre},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_QELS-2020-FTh3C.3 https://www.osapublishing.org/abstract.cfm?URI=CLEO_QELS-2020-FTh3C.3},
doi = {10.1364/CLEO_QELS.2020.FTh3C.3},
isbn = {978-1-943580-76-7},
year  = {2020},
date = {2020-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
pages = {FTh3C.3},
publisher = {OSA},
address = {Washington, D.C.},
series = {OSA Technical Digest},
abstract = {We propose and numerically validate a modified perturbation theory that captures non-Hermitian features present in dissipative optomechanical systems. Our theory predicts different behaviors than commonly used perturbation theories derived assuming purely Hermitian dynamics.},
keywords = {Microresonators, nanophotonics, Optical resonators, Optomechanics, Refractive index, Ring resonators},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{DeOliveiraZurita2020,
title = {Strong confinement of short-wave Brillouin phonons in silicon waveguide periodic lattices},
author = {Roberto {de Oliveira Zurita} and Gustavo S Wiederhecker and Thiago P M Alegre},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_QELS-2020-FTh3C.2 https://www.osapublishing.org/abstract.cfm?URI=CLEO_QELS-2020-FTh3C.2},
doi = {10.1364/CLEO_QELS.2020.FTh3C.2},
isbn = {978-1-943580-76-7},
year  = {2020},
date = {2020-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
pages = {FTh3C.2},
publisher = {OSA},
address = {Washington, D.C.},
series = {OSA Technical Digest},
abstract = {We propose a feasible silicon waveguide design that can strongly trap short-wavelength Brillouin phonons. Intramodal backward Brillouin gain is improved about 4.3 while radiation losses are suppressed. The structure could be implemented using SOI technology.},
keywords = {silicon, Stimulated Brillouin scattering, Stimulated scattering, Waveguide design, Waveguide gratings, Waveguide modes},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{Inga2020b,
title = {Tailoring group-velocity dispersion in microspheres with alumina coating},
author = {Marvyn Inga and Lais Fujii dos Santos and Jose M C {da Silva Filho} and Y A V Espinel and Francisco C Marques and Thiago P M Alegre and Gustavo S Wiederhecker},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_QELS-2020-JTh2C.4 https://www.osapublishing.org/abstract.cfm?URI=CLEO_AT-2020-JTh2C.4},
doi = {10.1364/CLEO_AT.2020.JTh2C.4},
isbn = {978-1-943580-76-7},
year  = {2020},
date = {2020-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
pages = {JTh2C.4},
publisher = {OSA},
address = {Washington, D.C.},
series = {OSA Technical Digest},
abstract = {We experimentally demonstrate that the group-velocity dispersion of silica microspheres can be engineered by coating it with nanometer-thick layers of alumina (Al2O3). The ultra-high optical quality factor (> 107) achieved allows for the generation of optical frequency combs.},
keywords = {Atomic force microscopy, Dispersion, Extinction ratios, Frequency combs, Tapered fibers, Tunable diode lasers},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{Primo2020a,
title = {Thermodynamic model for photothermal effects in optomechanics},
author = {André G Primo and Rodrigo Benevides and Cau{ê} M Kersul and Pierre-Louis de Assis and Gustavo S Wiederhecker and Thiago P M Alegre},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2020-STh1R.6 https://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2020-STh1R.6},
doi = {10.1364/CLEO_SI.2020.STh1R.6},
isbn = {978-1-943580-76-7},
year  = {2020},
date = {2020-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
pages = {STh1R.6},
publisher = {OSA},
address = {Washington, D.C.},
series = {OSA Technical Digest},
abstract = {We derive and validate a model for the photothermal forces that act on optomechanical cavities. Our results not only enable the prediction of such effect but also show that it is much stronger than previously estimated.},
keywords = {Finite element method, Optical absorption, Optical resonators, Optomechanics, Photothermal effects, Radiation pressure},
pubstate = {published},
tppubtype = {inproceedings}
}
@article{Barnard:2019aa,
title = {Real-time vibrations of a carbon nanotube},
author = {Arthur W Barnard and Mian Zhang and Gustavo S Wiederhecker and Michal Lipson and Paul L McEuen},
url = {https://doi.org/10.1038/s41586-018-0861-0},
doi = {10.1038/s41586-018-0861-0},
isbn = {1476-4687},
year  = {2019},
date = {2019-01-01},
journal = {Nature},
volume = {566},
number = {7742},
pages = {89--93},
abstract = {The field of miniature mechanical oscillators is rapidly evolving, with emerging applications including signal processing, biological detection1 and fundamental tests of quantum mechanics2. As the dimensions of a mechanical oscillator shrink to the molecular scale, such as in a carbon nanotube resonator3--7, their vibrations become increasingly coupled and strongly interacting8,9 until even weak thermal fluctuations could make the oscillator nonlinear10--13. The mechanics at this scale possesses rich dynamics, unexplored because an efficient way of detecting the motion in real time is lacking. Here we directly measure the thermal vibrations of a carbon nanotube in real time using a high-finesse micrometre-scale silicon nitride optical cavity as a sensitive photonic microscope. With the high displacement sensitivity of 700 fm Hz−1/2 and the fine time resolution of this technique, we were able to discover a realm of dynamics undetected by previous time-averaged measurements and a room-temperature coherence that is nearly three orders of magnitude longer than previously reported. We find that the discrepancy in the coherence stems from long-time non-equilibrium dynamics, analogous to the Fermi--Pasta--Ulam--Tsingou recurrence seen in nonlinear systems14. Our data unveil the emergence of a weakly chaotic mechanical breather15, in which vibrational energy is recurrently shared among several resonance modes---dynamics that we are able to reproduce using a simple numerical model. These experiments open up the study of nonlinear mechanical systems in the Brownian limit (that is, when a system is driven solely by thermal fluctuations) and present an integrated, sensitive, high-bandwidth nanophotonic interface for carbon nanotube resonators.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{Wiederhecker:2019ey,
title = {Brillouin optomechanics in nanophotonic structures},
author = {Gustavo S Wiederhecker and Paulo Dainese and Thiago Mayer P Alegre},
url = {http://aip.scitation.org/doi/10.1063/1.5088169},
doi = {10.1063/1.5088169},
year  = {2019},
date = {2019-01-01},
journal = {APL Photonic},
volume = {4},
number = {7},
pages = {071101},
publisher = {AIP Publishing LLC},
abstract = {The interaction between light and mesoscopic mechanical degrees of freedom has been investigated under various perspectives, from spectroscopy in condensed matter, optical tweezer particle trapping, and long-haul optical fiber communication system penalties to gravitational-wave detector noise. In the context of integrated photonics, two topics with dissimilar origins—cavity optomechanics and guided wave Brillouin scattering—are rooted in the manipulation and control of the energy exchange between trapped light and mechanical modes. In this tutorial, we explore the impact of optical and mechanical subwavelength confinement on the interaction among these waves, coined as Brillouin optomechanics. At this spatial scale, optical and mechanical fields are fully vectorial and the common intuition that more intense fields lead to stronger interaction may fail. Here, we provide a thorough discussion on how the two major physical effects responsible for the Brillouin interaction—photoelastic and moving-boundary effects—interplay to foster exciting possibilities in this field. In order to stimulate beginners into this growing research field, this tutorial is accompanied by all the discussed simulation material based on a widespread commercial finite-element solver.The interaction between light and mesoscopic mechanical degrees of freedom has been investigated under various perspectives, from spectroscopy in condensed matter, optical tweezer particle trapping, and long-haul optical fiber communication system penalties to gravitational-wave detector noise. In the context of integrated photonics, two topics with dissimilar origins—cavity optomechanics and guided wave Brillouin scattering—are rooted in the manipulation and control of the energy exchange between trapped light and mechanical modes. In this tutorial, we explore the impact of optical and mechanical subwavelength confinement on the interaction among these waves, coined as Brillouin optomechanics. At this spatial scale, optical and mechanical fields are fully vectorial and the common intuition that more intense fields lead to stronger interaction may fail. Here, we provide a thorough discussion on how the two major physical effects responsible for the Brillouin interaction—photoelastic and moving-boundary ef...},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@techreport{Wiederhecker:2019bq,
title = {Data and simulations files for the tutorial article },
author = {Gustavo Wiederhecker and Paulo Dainese and Thiago P Mayer Alegre},
url = {https://zenodo.org/record/1971811},
doi = {10.5281/zenodo.1971811},
year  = {2019},
date = {2019-01-01},
abstract = {Data and simulations files for the tutorial article "Brillouin optomechanics in nanophotonic structures". Published in APL Photonics Special issue Öptoacoustics—Advances in high-frequency optomechanics and Brillouin scattering" - DOI: 10.1063/1.5088169},
keywords = {},
pubstate = {published},
tppubtype = {techreport}
}
@inproceedings{Primo:19,
title = {Modelling bolometric backaction in cavity optomechanics},
author = {André G Primo and Rodrigo Benevides and Cauê M Kersul and Pierre-Louis de Assis and Gustavo S Wiederhecker and Thiago P M Alegre},
url = {http://www.osapublishing.org/abstract.cfm?URI=FiO-2019-JTu3A.87},
doi = {10.1364/FIO.2019.JTu3A.87},
year  = {2019},
date = {2019-01-01},
booktitle = {Frontiers in Optics $+$ Laser Science APS/DLS},
journal = {Frontiers in Optics $+$ Laser Science APS/DLS},
pages = {JTu3A.87},
publisher = {Optical Society of America},
abstract = {From thermodynamic considerations we derive a model for thermally driven stresses that induce changes on acoustic dynamics, enabling the engineering of devices where these effects are suppressed or enhanced when compared to optomechanical backaction.},
keywords = {Linewidth; Microcavities; Optical absorption; Optomechanics; Photons; Radiation pressure},
pubstate = {published},
tppubtype = {inproceedings}
}
@article{ISI:000432841700001,
title = {Self-Sustained Laser Pulsation in Active Optomechanical Devices},
author = {Debora Princepe and Gustavo S Wiederhecker and Ivan Favero and Newton C Frateschi},
doi = {10.1109/JPHOT.2018.2831001},
issn = {1943-0655},
year  = {2018},
date = {2018-06-01},
journal = {IEEE PHOTONICS JOURNAL},
volume = {10},
number = {3},
publisher = {IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC},
address = {445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA},
abstract = {We developed a model for an active optomechanical cavity embedding a 
 semiconductor optical gain medium in the presence of dispersive and 
 dissipative optomechanical couplings. Radiation pressure drives the 
 mechanical oscillation and the back-action occurs due to the mechanical 
 modulation of the cavity loss rate. Our numerical analysis utilizing 
 this model shows that, even in a wideband gain material, such mechanism 
 couples the mechanical vibration with the laser relaxation oscillation, 
 enabling an effect of self-pulsed laser emission. In order to 
 investigate this effect, we propose a bullseye-shaped device with high 
 confinement of both the optical and the mechanical modes at the edge of 
 a disk combined with a dissipative structure in its vicinity. The 
 dispersive interaction is promoted by the strong photoelastic effect 
 while the dissipative mechanism is governed by the boundary motion 
 mechanism, enhanced by near-field interaction with the absorptive 
 structure. This hybrid optomechanical device is shown to lead sufficient 
 coupling for the experimental demonstration of the self-pulsed emission.},
keywords = {{Semiconductors lasers; micro and nano opto-electro-mechanical systems   (MOEMS)}},
pubstate = {published},
tppubtype = {article}
}
@article{Souza2018,
title = {Fourier transform spectrometer on silicon with thermo-optic  non-linearity and dispersion correction},
author = {Mario C M M Souza and Andrew Grieco and Newton C Frateschi and Yeshaiahu Fainman},
url = {https://doi.org/10.1038/s41467-018-03004-6},
doi = {10.1038/s41467-018-03004-6},
issn = {2041-1723},
year  = {2018},
date = {2018-02-01},
journal = {NATURE COMMUNICATIONS},
volume = {9},
publisher = {NATURE PUBLISHING GROUP},
address = {MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND},
abstract = {Miniaturized integrated spectrometers will have unprecedented impact on 
 applications ranging from unmanned aerial vehicles to mobile phones, and 
 silicon photonics promises to deliver compact, cost-effective devices. 
 Mirroring its ubiquitous free-space counterpart, a silicon 
 photonics-based Fourier transform spectrometer (Si-FTS) can bring 
 broadband operation and fine resolution to the chip scale. Here we 
 present the modeling and experimental demonstration of a thermally tuned 
 Si-FTS accounting for dispersion, thermo-optic non-linearity, and 
 thermal expansion. We show how these effects modify the relation between 
 the spectrum and interferogram of a light source and we develop a 
 quantitative correction procedure through calibration with a tunable 
 laser. We retrieve a broadband spectrum (7 THz around 193.4 THz with 
 0.38-THz resolution consuming 2.5W per heater) and demonstrate the 
 Si-FTS resilience to fabrication variations - a major advantage for 
 large-scale manufacturing. Providing design flexibility and robustness, 
 the Si-FTS is poised to become a fundamental building block for on-chip 
 spectroscopy.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@mastersthesis{Fujii:wv,
title = {Dispersion engineering and frequency comb generation in silicon oxide wedge microdisks},
author = {Lais Fujii},
url = {http://repositorio.unicamp.br/jspui/handle/REPOSIP/332249},
year  = {2018},
date = {2018-01-01},
publisher = {[s.n.]},
school = {[s.n.]},
abstract = {Resumo: A gerac c~ao de pentes de frequ^encia tem sido um campo ativo de pesquisa, com aplicac c~oes indo de metrologia a astronomia, passando por espectroscopia e medidas de dist^ancia mais precisas. Um dos principais métodos de gerac c~ao de pentes é por meio de mistura de quatro ondas, um processo n~ao-linear de terceira ordem no qual um par de fótons é substitu'ido por outro par com novas frequ^encias (conservando energia e momento). A alta intensidade óptica necessária para o desencadeamento deste processo é obtida através da intensificac c~ao ressonante do campo eletromagnético no interior de uma microcavidade, que confina a luz em pequenos volumes e reduz a pot^encia de entrada. Além da vantagem energética e do potencial para miniaturizac c~ao e produc c~ao em larga escala, essa plataforma possibilita a customizac c~ao de par^ametros do pente de frequ^encia: a taxa de repetic c~ao do pente escala com o inverso do raio da cavidade, pois as bandas laterais criadas devem coincidir com as frequ^encias harm^onicas do dispositivo. A largura de banda do pente também pode ser controlada com um planejamento cuidadoso da geometria do dispositivo, pois é limitada em grande parte pela variac c~ao do intervalo espectral livre com a frequ^encia. Nesta dissertac c~ao, estudamos como a dispers~ao modal de um microdisco de óxido de sil'icio em forma de cunha é modificada por mudanc cas em suas caracter'isticas geométricas. Para tanto, desenvolvemos a habilidade de controlar o ^angulo dos dispositivos fabricados e de medir a dispers~ao do modo fundamental a partir de seus espectros de transmiss~ao. Os resultados (corroborados por simulac c~oes numéricas) mostram que a dispers~ao (em 1550 nm) vai de normal a an^omala com o aumento do ^angulo. Ainda, utilizamos os dispositivos fabricados para gerar pentes de frequ^encia no regime de dispers~ao an^omala e concluimos que a din^amica de formac c~ao é bem descrita pelo formalismo de expans~ao modal},
keywords = {},
pubstate = {published},
tppubtype = {mastersthesis}
}
@inproceedings{Benevides:18,
title = {Overcoming optical spring effect with thermo-opto-mechanical coupling in GaAs microdisks},
author = {Rodrigo Benevides and Natália C Carvalho and Michaël Ménard and Newton C Frateschi and Gustavo S Wiederhecker and Thiago P M Alegre},
url = {http://www.osapublishing.org/abstract.cfm?URI=LAOP-2018-W4D.4},
doi = {10.1364/LAOP.2018.W4D.4},
year  = {2018},
date = {2018-01-01},
booktitle = {Latin America Optics and Photonics Conference},
journal = {Latin America Optics and Photonics Conference},
pages = {W4D.4},
publisher = {Optical Society of America},
abstract = {We demonstrate a composite coupling between optical fields, acoustic modes and thermal expansion in gallium arsenide microdisks. A relationship between optical detuning and mechanical frequency diverse from traditional optomechanical theory is also observed.},
keywords = {Composite materials; Finite element method; Gallium arsenide; Optical fields; Tunable lasers; Whispering gallery modes},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{Wiederhecker:18,
title = {Towards fabless optomechanics: enhancing light and sound interaction in a CMOS-complatible platform},
author = {Gustavo S Wiederhecker and Thiago Mayer P Alegre and Paulo Dainese and Newton C Frateschi},
url = {http://www.osapublishing.org/abstract.cfm?URI=LAOP-2018-W3E.2},
doi = {10.1364/LAOP.2018.W3E.2},
year  = {2018},
date = {2018-01-01},
booktitle = {Latin America Optics and Photonics Conference},
journal = {Latin America Optics and Photonics Conference},
pages = {W3E.2},
publisher = {Optical Society of America},
abstract = {In this talk we will review our recent efforts in enabling strong interaction between light and mechanical modes using a mixed foundry and in-house fabrication approach.},
keywords = {Microcavities; Optomechanics; Photoelasticity; Quantum wells; Silicon photonics; Waveguides},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{Santos:18,
title = {Dispersion Control in Silicon Oxide Wedge Microdisks},
author = {Laís F Santos and Marvyn Inga and Jorge H Soares and Mayer T P Alegre and G S Wiederhecker},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2018-JTu2A.111},
doi = {10.1364/CLEO_AT.2018.JTu2A.111},
year  = {2018},
date = {2018-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
journal = {Conference on Lasers and Electro-Optics},
pages = {JTu2A.111},
publisher = {Optical Society of America},
abstract = {We demonstrate the generation of optical frequency combs by engineering the dispersion of a small radius (100 microns) thin wedge microcavity. The phase-matching of the excitation taper is also employed to inhibit avoided-crossings.},
keywords = {Dispersion; Dissipative solitons; Frequency combs; Light sources; Nanopositioning equipment; Silicon},
pubstate = {published},
tppubtype = {inproceedings}
}
@article{Luiz:17,
title = {Efficient anchor loss suppression in coupled near-field optomechanical resonators},
author = {Gustavo O Luiz and Rodrigo S Benevides and Felipe G S Santos and Yovanny A V Espinel and Thiago Mayer P Alegre and Gustavo S Wiederhecker},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-25-25-31347},
doi = {10.1364/OE.25.031347},
year  = {2017},
date = {2017-12-01},
journal = {Opt. Express},
volume = {25},
number = {25},
pages = {31347--31361},
publisher = {OSA},
abstract = {Elastic dissipation through radiation towards the substrate is a major loss channel in micro- and nanomechanical resonators. Engineering the coupling of these resonators with optical cavities further complicates and constrains the design of low-loss optomechanical devices. In this work we rely on the coherent cancellation of mechanical radiation to demonstrate material and surface absorption limited silicon near-field optomechanical resonators oscillating at tens of MHz. The effectiveness of our dissipation suppression scheme is investigated at room and cryogenic temperatures. While at room temperature we can reach a maximum quality factor of 7.61k (fQ-product of the order of 1011 Hz), at 22 K the quality factor increases to 37k, resulting in a fQ-product of 2 × 1012 Hz.},
keywords = {Optomechanics; Resonators},
pubstate = {published},
tppubtype = {article}
}
@article{ISI:000407815100078,
title = {Hybrid multimode resonators based on grating-assisted 
 counter-directional couplers},
author = {Jordan A Davis and Andrew Grieco and Mario C M M Souza and Newton C Frateschi and Yeshaiahu Fainman},
doi = {10.1364/OE.25.016484},
issn = {1094-4087},
year  = {2017},
date = {2017-07-01},
journal = {OPTICS EXPRESS},
volume = {25},
number = {14},
pages = {16484-16490},
publisher = {OPTICAL SOC AMER},
address = {2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA},
abstract = {Research thrusts in silicon photonics are developing control operations 
 using higher order waveguide modes for next generation high-bandwidth 
 communication systems. In this context, devices allowing optical 
 processing of multiple waveguide modes can reduce architecture 
 complexity and enable flexible on-chip networks. We propose and 
 demonstrate a hybrid resonator dually resonant at the 1st and 2nd order 
 modes of a silicon waveguide. We observe 8 dB extinction ratio and modal 
 conversion range of 20 nm for the 1st order quasi-TE mode input. (C) 
 2017 Optical Society of America},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{Espinel:2017aa,
title = {Brillouin Optomechanics in Coupled Silicon Microcavities},
author = {Espinel, Y. A. V. and Santos, F. G. S. and Luiz, G. O. and Alegre, T. P. Mayer and Wiederhecker, G. S.},
url = {http://dx.doi.org/10.1038/srep43423
https://arxiv.org/abs/1609.09509},
year  = {2017},
date = {2017-03-06},
journal = {Scientific Reports},
volume = {7},
pages = {43423 EP -},
publisher = {The Author(s) SN -},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{Santos:17,
title = {Hybrid confinement of optical and mechanical modes in a bullseye optomechanical resonator},
author = {Felipe G. S. Santos and Yovanny A. V. Espinel and Gustavo O. Luiz and Rodrigo S. Benevides and Gustavo S. Wiederhecker and Thiago P. Mayer Alegre},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-25-2-508
https://arxiv.org/abs/1605.06318},
doi = {10.1364/OE.25.000508},
year  = {2017},
date = {2017-01-01},
journal = {Opt. Express},
volume = {25},
number = {2},
pages = {508--529},
publisher = {OSA},
abstract = {Optomechanical cavities have proven to be an exceptional tool to explore fundamental and applied aspects of the interaction between mechanical and optical waves. Here we demonstrate a novel optomechanical cavity based on a disk with a radial mechanical bandgap. This design confines light and mechanical waves through distinct physical mechanisms which allows for independent control of the mechanical and optical properties. Simulations foresee an optomechanical coupling rate g0 reaching 2π × 100 kHz for mechanical frequencies around 5 GHz as well as anchor loss suppression of 60 dB. Our device design is not limited by unique material properties and could be easily adapted to allow for large optomechanical coupling and high mechanical quality factors with other promising materials. Finally, our devices were fabricated in a commercial silicon photonics facility, demonstrating g0/2π $=$ 23 kHz for mechanical modes with frequencies around 2 GHz and mechanical Q-factors as high as 2300 at room temperature, also showing that our approach can be easily scalable and useful as a new platform for multimode optomechanics.},
keywords = {Optomechanics; Micro-optical devices; Resonators},
pubstate = {published},
tppubtype = {article}
}
@article{Benevides:2017aa,
title = {Ultrahigh-Q optomechanical crystal cavities fabricated in a CMOS foundry},
author = {Benevides, Rodrigo and Santos, Felipe G. S. and Luiz, Gustavo O. and Wiederhecker, Gustavo S. and Alegre, Thiago P. Mayer},
url = {http://dx.doi.org/10.1038/s41598-017-02515-4},
doi = {10.1038/s41598-017-02515-4},
isbn = {2045-2322},
year  = {2017},
date = {2017-01-01},
journal = {Scientific Reports},
volume = {7},
number = {1},
pages = {2491},
abstract = {Photonic crystals use periodic structures to create frequency regions where the optical wave propagation is forbidden, which allows the creation and integration of complex optical functionalities in small footprint devices. Such strategy has also been successfully applied to confine mechanical waves and to explore their interaction with light in the so-called optomechanical cavities. Because of their challenging design, these cavities are traditionally fabricated using dedicated high-resolution electron-beam lithography tools that are inherently slow, limiting this solution to small-scale or research applications. Here we show how to overcome this problem by using a deep-UV photolithography process to fabricate optomechanical crystals in a commercial CMOS foundry. We show that a careful design of the photonic crystals can withstand the limitations of the photolithography process, producing cavities with measured intrinsic optical quality factors as high as Q i = (1.21 $pm$0.02) ×106. Optomechanical crystals are also created using phononic crystals to tightly confine the GHz sound waves within the optical cavity, resulting in a measured vacuum optomechanical coupling rate of g 0 = 2π×(91 $pm$4) kHz. Efficient sideband cooling and amplification are also demonstrated since these cavities are in the resolved sideband regime. Further improvements in the design and fabrication process suggest that commercial foundry-based optomechanical cavities could be used for quantum ground-state cooling.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@inproceedings{ISI:000427296201163,
title = {Synchronization of thermal-carrier oscillations in coupled silicon 
 microcavities},
author = {Gustavo O Luiz and Thiago P M Alegre and Gustavo S Wiederhecker},
issn = {2160-9020},
year  = {2017},
date = {2017-01-01},
booktitle = {2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)},
publisher = {IEEE},
address = {345 E 47TH ST, NEW YORK, NY 10017 USA},
organization = {IEEE},
series = {Conference on Lasers and Electro-Optics},
abstract = {We report on the synchronization of thermal-carrier self-sustaining 
 oscillations in coupled silicon microdisks. Time and frequency domain 
 signatures of synchronization are observed.},
note = {Conference on Lasers and Electro-Optics (CLEO), San Jose, CA, MAY 14-19, 
 2017},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
@phdthesis{Santos:2017ta,
title = {Cavity optomechanics in silicon disks and nanostructured disks},
author = {Felipe G S Santos},
url = {http://repositorio.unicamp.br/jspui/handle/REPOSIP/325359},
year  = {2017},
date = {2017-01-01},
abstract = {A optomec^anica de cavidades se transformou numa área de estudos muito rica, com aplicac c~oes em interfer^ometros de ondas gravitacionais, fundamentos de mec^anica qu^antica, simulac c~oes qu^anticas, sincronizac c~ao, filtros ópticos reconfiguráveis por luz, memórias ópticastextquestiondownentre diversas outras. Dos muitos dispositivos relatados na literatura, microcavidades integradas em chips s~ao uma alternativa promissora para o estudo de efeitos din^amicos devido `a interac c~ao entre ondas ópticas e ondas mec^anicas confinadas. Entre as microcavidades, discos e cristais optomec^anicos (baseados em confinamento por bandgaps fot^onico e fon^onico) s~ao dispositivos especialmente promissores e frequentemente estudados, cada um tendo vantagens 'unicas. Nesta tese, unimos a versatilidade dos discos ao confinamento por bandgap numa nova proposta de dispositivo optomec^anico, o bullseye (ingl^es para älvo"). De um lado, produzimos conhecimento local em fabricac c~ao e caracterizac c~ao de discos optomec^anicos de sil'icio, chegando a larguras de linha óptica menores que 1 GHz (fator de qualidade da ordem de 105). De outro, mostramos que o bullseye pode superar algumas limitac c~oes dos discos simples com o intuito de alcanc car o chamado regime de banda lateral resolvida, no qual a frequ^encia de resson^ancia mec^anica é maior que a largura de linha óptica. A partir de simulac c~oes pelo método dos elementos finitos, compreendemos em profundidade as propriedades optomec^anicas do bullseye, prevendo modos mec^anicos de alta frequ^encia com taxa de acoplamento optomec^anico (medida do desvio da frequ^encia óptica devido a flutuac c~oes do estado fundamental mec^anico) de até 200 kHz textquestiondown valor igual ao dispositivos considerados estado-da-arte. Por fim, demonstramos experimentalmente as propriedades optomec^anicas do bullseye em amostras fabricadas com processos industriais CMOS, um resultado importante que abre o caminho para aplicac c~oes massivas, tanto comerciais quanto em pesquisa, de cavidades optomec^anicas},
keywords = {},
pubstate = {published},
tppubtype = {phdthesis}
}
@article{ISI:000389654000042,
title = {Magnetically controllable silicon microring with ferrofluid cladding},
author = {A El Amili and M C M M Souza and F Vallini and N C Frateschi and Y Fainman},
doi = {10.1364/OL.41.005576},
issn = {0146-9592},
year  = {2016},
date = {2016-12-01},
journal = {OPTICS LETTERS},
volume = {41},
number = {23},
pages = {5576-5579},
publisher = {OPTICAL SOC AMER},
address = {2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA},
abstract = {We experimentally investigate the application of magnetic fluids (MFs) 
 on integrated silicon photonics. Using a ferro-fluid-clad silicon 
 microring resonator, we demonstrate active control of resonances by 
 applying an external magnetic field. Relatively high loaded quality 
 factors on the order of 6000 are achieved, despite the optical losses 
 introduced by the magnetic nanoparticles. We demonstrate resonance 
 shifts of 185 pm in response to a 110 Oe strong magnetic field, 
 corresponding to an overall refractive index change of -3.2 x 10(-3) for 
 the cladding MF. The combination of MFs and integrated photonics could 
 potentially lead to the development of magnetically controllable optical 
 devices and ultra-compact cost-effective magnetic field sensors. (C) 
 2016 Optical Society of America},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{Souza:2016aa,
title = {Modeling quasi-dark states with temporal coupled-mode theory},
author = {Mario C. M. M. Souza and Guilherme F. M. Rezende and Luis A. M. Barea and Gustavo S. Wiederhecker and Newton C. Frateschi},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-24-17-18960},
doi = {10.1364/OE.24.018960},
year  = {2016},
date = {2016-08-01},
journal = {Opt. Express},
volume = {24},
number = {17},
pages = {18960--18972},
publisher = {OSA},
abstract = {Coupled resonators are commonly used to achieve tailored spectral responses and allow novel functionalities in a broad range of applications. The Temporal Coupled-Mode Theory (TCMT) provides a simple and general tool that is widely used to model these devices. Relying on TCMT to model coupled resonators might however be misleading in some circumstances due to the lumped-element nature of the model. In this article, we report an important limitation of TCMT related to the prediction of dark states. Studying a coupled system composed of three microring resonators, we demonstrate that TCMT predicts the existence of a dark state that is in disagreement with experimental observations and with the more general results obtained with the Transfer Matrix Method (TMM) and the Finite-Difference Time-Domain (FDTD) simulations. We identify the limitation in the TCMT model to be related to the mechanism of excitation/decay of the supermodes and we propose a correction that effectively reconciles the model with expected results. Our discussion based on coupled microring resonators can be useful for other electromagnetic resonant systems due to the generality and far-reach of the TCMT formalism.},
keywords = {Optical devices; Coupled resonators},
pubstate = {published},
tppubtype = {article}
}
@inproceedings{Soares:2016aa,
title = {Tunable third-harmonic generation in silicon oxide wedge microcavities},
author = {Jorge H. Soares and Felipe G. Santos and Lais Fujii and Gustavo S. Wiederhecker and Thiago P. Alegre},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2016-STh3P.5},
doi = {10.1364/CLEO_SI.2016.STh3P.5},
year  = {2016},
date = {2016-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
journal = {Conference on Lasers and Electro-Optics},
pages = {STh3P.5},
publisher = {Optical Society of America},
abstract = {We demonstrate tunable third-harmonic generation (THG) using a multimode microcavity. The silicon-oxide wedge-resonator is pumped around 1550 nm telecom band and generates tunable THG (512-520 nm) with a collected power efficiency of 10-5.},
keywords = {Harmonic generation and mixing ; Nonlinear optics, integrated optics; Micro-optical devices},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{daSilvaBenevides:16,
title = {Optomechanical Oscillators Fabricated in a CMOS-compatible Foundry},
author = {Rodrigo da Silva Benevides and Gustavo de Oliveira Luiz and Felipe G. Santos and Gustavo Wiederhecker and Thiago P. Alegre},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2016-JTh2A.99},
year  = {2016},
date = {2016-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
journal = {Conference on Lasers and Electro-Optics},
pages = {JTh2A.99},
publisher = {Optical Society of America},
abstract = {We demonstrate self-sustained mechanical oscillations at room temperature and ambient pressure in a silicon photonic crystal slot-cavity fabricated by a CMOS-Foundry. Optical quality factor as high as Qopt$=$4 texttimes 105 and an optomechanical coupling rate of g0/2$pi$$=$76 kHz are observed.},
keywords = {Optomechanics; Acousto-optical devices; Nanophotonics and photonic crystals},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{Florez:16,
title = {Theory and Observation of the Brillouin Scattering Self-Cancellation},
author = {Omar Florez and Paulo Jarschel and Yovanny A. Espinel and Cristiano M. Cordeiro and Thiago P. Mayer Alegre and Gustavo S. Wiederhecker and Paulo C. Dainese},
url = {http://www.osapublishing.org/abstract.cfm?URI=LAOP-2016-LTu5C.1},
doi = {10.1364/LAOP.2016.LTu5C.1},
year  = {2016},
date = {2016-01-01},
booktitle = {Latin America Optics and Photonics Conference},
journal = {Latin America Optics and Photonics Conference},
pages = {LTu5C.1},
publisher = {Optical Society of America},
abstract = {The Brillouin scattering self-cancellation effect arising from the interplay between the photo-elastic and moving-boundary effects is reviewed. Our recent demonstration of this effect for the fundamental Rayleigh acoustic mode in silica nanowires is also discussed.},
keywords = {and institutes, General; Conferences, lectures},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{Souza:2016ab,
title = {Modifying Coupled Mode Theory to model quasi-dark states in coupled resonators},
author = {Mario C. Souza and Guilherme Rezende and Luis Barea and Gustavo Wiederhecker and Newton Frateschi},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2016-JTh2A.94},
year  = {2016},
date = {2016-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
journal = {Conference on Lasers and Electro-Optics},
pages = {JTh2A.94},
publisher = {Optical Society of America},
abstract = {We show that Coupled Mode Theory incorrectly predicts a dark state for a coupled resonator design and we propose a correction that effectively reconciles it with results obtained experimentally and through the Transfer Matrix Method.},
keywords = {Resonance; Coupled resonators},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{Oliveira-Luiz:2016aa,
title = {Material limited high-Q mechanical paddle-resonator},
author = {Gustavo de Oliveira Luiz and Felipe G. Santos and Rodrigo da Silva Benevides and Yovanny Espinel and Thiago P. Alegre and Gustavo Wiederhecker},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2016-STu4E.2},
doi = {10.1364/CLEO_SI.2016.STu4E.2},
year  = {2016},
date = {2016-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
journal = {Conference on Lasers and Electro-Optics},
pages = {STu4E.2},
publisher = {Optical Society of America},
abstract = {We used destructive interference of elastic waves to obtain material limited high quality factor micro mechanical devices probed with an optical cavity. Mechanical quality factors as high as 28texttimes103 were measured.},
keywords = {Optomechanics; Resonators},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{Florez:2016aa,
title = {Demonstration of Brillouin Scattering Self-Cancellation},
author = {Omar Florez and Paulo F. Jarschel and Yovanny A. Espinel and Cristiano M. Cordeiro and Thiago P. Alegre and Gustavo Wiederhecker and Paulo C. Dainese},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2016-STu3E.6},
doi = {10.1364/CLEO_SI.2016.STu3E.6},
year  = {2016},
date = {2016-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
journal = {Conference on Lasers and Electro-Optics},
pages = {STu3E.6},
publisher = {Optical Society of America},
abstract = {We experimentally demonstrate the cancellation of Brillouin scattering by engineering a sub-wavelength diameter silica wire with exactly opposite photo-elastic and moving-boundary contributions.},
keywords = {Brillouin; Optomechanics, fibers; Scattering, Nonlinear optics},
pubstate = {published},
tppubtype = {inproceedings}
}
@article{Florez:2016iz,
title = {Brillouin scattering self-cancellation},
author = {Florez, O and Jarschel, P F and Espinel, Y A V and Cordeiro, C M B and Mayer Alegre, T P and Wiederhecker, G S and Dainese, P},
url = {http://www.nature.com/doifinder/10.1038/ncomms11759
https://arxiv.org/abs/1601.05248},
doi = {10.1038/ncomms11759},
year  = {2016},
date = {2016-01-01},
journal = {Nature Communications},
volume = {7},
pages = {11759},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@inproceedings{Santos:2016aa,
title = {Bullseye Optomechanical Resonator},
author = {Felipe G. Santos and Yovanny Espinel and Gustavo de Oliveira Luiz and Rodrigo da Silva Benevides and Gustavo Wiederhecker and Thiago P. Alegre},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2016-STu4E.4},
doi = {10.1364/CLEO_SI.2016.STu4E.4},
year  = {2016},
date = {2016-01-01},
booktitle = {Conference on Lasers and Electro-Optics},
journal = {Conference on Lasers and Electro-Optics},
pages = {STu4E.4},
publisher = {Optical Society of America},
abstract = {We demonstrate an optomechanical resonator that can tightly confine phonons through a circular phononic shield. Our design allows for independently trimmable long living optical and mechanical modes with large optomechanical coupling.},
keywords = {Optomechanics; Acousto-optical devices; Resonators},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{ISI:000392469000033,
title = {Simulation and Fabrication of Silicon Nitride Microring Resonator by DUV 
 Lithography},
author = {Giuseppe A Cirino and Luis A Barea and Antonio A von Zuben and Herve L'hermite and Bruno Beche and Olivier De Sagazan and Newton Frateschi and Tayeb M-Brahim},
isbn = {978-1-5090-2788-0},
year  = {2016},
date = {2016-01-01},
booktitle = {2016 31ST SYMPOSIUM ON MICROELECTRONICS TECHNOLOGY AND DEVICES (SBMICRO)},
publisher = {IEEE},
address = {345 E 47TH ST, NEW YORK, NY 10017 USA},
organization = {IEEE; SBA; Brazilian Comp Soc; Electron Devices Soc; ECS; Departamento 
 Ciencia Computacao; Departamento Engenharia Eletrica; Departamento 
 Fisica; Univ Fed Minas Gerais, Escola Engenharia; PPGEE; DELT; BNDES; 
 BRASIL GOVERNO FED; IFIP; CAS; Sociedade Brasileira Fisica; IEEE 
 Instrumentat & Measurement Soc; Assoc Comp Machinery; IEEE Council 
 Elect Design Automat; FAPEMIG; Conselho Nacional Desenvolvimento 
 Cientifico Tecnologico; CAPES; Unitec semicondutores},
abstract = {This work reports the design and fabrication of silicon nitride-based 
 microresonators by employing DUV optical lithography and ICP-RIE plasma 
 etching. Microring devices with high Q factors provide high sensitivity 
 and low detection limit, enabling their use in biochemical sensing 
 applications. With these properties, the devices can be used to detect 
 and quantify the biomolecules present in a homogeneous solution, by 
 detecting an effective refractive index change, without using 
 fluorescent labels.},
note = {31st Symposium on Microelectronics Technology and Devices (SBMicro), 
 Belo Horizonte, BRAZIL, AUG 29-SEP 03, 2016},
keywords = {{Microcavity resonator; Silicon photonics; DUV Lithography; Evanescent   coupling; Biochemical sensing}},
pubstate = {published},
tppubtype = {inproceedings}
}
@mastersthesis{Benevides:2016uw,
title = {Optomechanics in photonic crystal cavities},
author = {Rodrigo S Benevides},
year  = {2016},
date = {2016-01-01},
address = {Campinas},
abstract = {The field of cavity optomechanics has experienced a rapid growth in last decade. The increasing interest in this area was mostly driven by the intricate interface between mechanical motion and the optical field. Such coupling is widely explored in a variety of experiments scaling from kilometer long interferometers to micrometer optical cavities. The challenge on all these experiments is to create an optomechanical device with long-living optical and mechanical resonances while keeping a large coupling rate. In this context photonic crystal cavities have emerged as a strong candidate since they are able to produce very small optical mode volume and long optical lifetime. In the classical regime, these tiny devices, which can mechanically oscillate from frequencies ranging from couple MHz up to tens of GHz, allows for highly sensitive small forces, masses, displacements and acceleration detectors. They are also used to produce high quality optically driven mechanical oscillators which can be synchronized via an optical field. In the quantum regime, cavity quantum optomechanics is being used to understand decoherence phenomena in a mesoscopic scale by creating nonclassical states between light and mechanical modes intermediated by optomechanical interaction. However up to now, few studies have been done concerning the possibility of large scale production of these devices, a necessary step towards massive technological and scientific application of these devices. 
In this work, we describe a detailed study of optomechanical cavities based upon photonic crystal cavities fabricated in a CMOS-compatible commercial foundry. We prove the feasibil- ity of this platform exploring three photonic crystal designs. First, we show how to achieve ultra-high optical quality factors using a design resilient to the fabrication constrains. Our demonstrated quality factors are the largest ever reported using photonic crystal cavities man- ufactured by optical lithography. Secondly, we investigate a slot type optical cavity, able to produce very large optomechanical coupling using a simple in-plane motion. Finally, we design a trimmable acoustic shield to restrict the mechanical motion inside the optical region. Such strategy was successfully used to produce high mechanical quality factor and optomechanical coupling which enabled the observation of cooling and amplification of mechanical modes at low temperature.},
keywords = {},
pubstate = {published},
tppubtype = {mastersthesis}
}
@article{Souza:15,
title = {Spectral engineering with coupled microcavities: active control of resonant mode-splitting},
author = {Mario C. M. M. Souza and Guilherme F. M. Rezende and Luis A. M. Barea and Antonio A. G. von Zuben and Gustavo S. Wiederhecker and Newton C. Frateschi},
url = {http://ol.osa.org/abstract.cfm?URI=ol-40-14-3332},
doi = {10.1364/OL.40.003332},
year  = {2015},
date = {2015-07-01},
journal = {Opt. Lett.},
volume = {40},
number = {14},
pages = {3332--3335},
publisher = {OSA},
abstract = {Optical mode-splitting is an efficient tool to shape and fine-tune the spectral response of resonant nanophotonic devices. The active control of mode-splitting, however, is either small or accompanied by undesired resonance-shifts, often much larger than the resonance splitting. We report a control mechanism that enables reconfigurable and widely tunable mode splitting while efficiently mitigating undesired resonance shifts. This is achieved by actively controlling the excitation of counter-traveling modes in coupled resonators. The transition from a large splitting (80 GHz) to a single-notch resonance is demonstrated using low-power microheaters (35 mW). We show that the spurious resonance shift in our device is only limited by thermal crosstalk, and resonance-shift-free splitting control may be achieved.},
keywords = {Integrated optics devices; Coupled resonators},
pubstate = {published},
tppubtype = {article}
}
@inproceedings{Souza:2015aa,
title = {Tunable Spectral Engineering of Coupled Silicon Microcavities},
author = {Mario C. Souza and Luis A. Barea and Gustavo Wiederhecker and Antonio A. von Zuben and Newton C. Frateschi},
url = {http://www.osapublishing.org/abstract.cfm?URI=CLEO_QELS-2015-JTu5A.49},
year  = {2015},
date = {2015-01-01},
booktitle = {CLEO: 2015},
journal = {CLEO: 2015},
pages = {JTu5A.49},
publisher = {Optical Society of America},
abstract = {We demonstrate the generation and control of optical resonance mode-splitting arising from a single-notch resonances using coupled silicon microring resonators with electrically controlled counter-propagating mode excitation.},
keywords = {Integrated optics devices; All-optical devices; Coupled resonators},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{Benevides:15,
title = {Optomechanical Crystals Fabricated by a CMOS Foundry},
author = {Rodrigo Benevides and Gustavo O. Luiz and Felipe G. Santos and Gustavo S. Wiederhecker and Thiago Alegre},
url = {http://www.osapublishing.org/abstract.cfm?URI=FiO-2015-FTu5C.3},
doi = {10.1364/FIO.2015.FTu5C.3},
year  = {2015},
date = {2015-01-01},
booktitle = {Frontiers in Optics 2015},
journal = {Frontiers in Optics 2015},
pages = {FTu5C.3},
publisher = {Optical Society of America},
abstract = {Photonics crystal optomechanical cavities fabricated on a commercial CMOS-compatible foundry are demonstrated. Despite the limited foundry design rules we could achieve a ultra-high Q (9.1texttimes105) photonic crystals and optomechanical crystal cavities with large coupling rate (g 0$=$60 KHz).},
keywords = {Photolithography; Photonic crystals ; Optomechanics},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{ISI:000378423000052,
title = {Fresnel Zone Plate Array Fabricated by Maskless Lithography},
author = {Luis A Barea and Antonio A von Zuben and Tayeb M-Brahim and Arlindo N Montagnoli and Michel Hospital and N Frateschi and Giuseppe A Cirino},
isbn = {978-1-4673-7162-9},
year  = {2015},
date = {2015-01-01},
booktitle = {2015 30TH SYMPOSIUM ON MICROELECTRONICS TECHNOLOGY AND DEVICES (SBMICRO)},
publisher = {IEEE},
address = {345 E 47TH ST, NEW YORK, NY 10017 USA},
organization = {Univ Fed Bahia; PET Engn Electrica; Sociedade Brasileira Computacao; 
 Sociedade Brasileira Microelectronica; IEEE Solid State Circuits Soc; 
 IEEE Elect Devices Soc; IFIP; CAPES; CNPq; SENAI CIMATEC},
abstract = {This work reports the fabrication of Fresnel Zone Plates (FZP) by 
 employing a maskless lithography tool based on direct laser writing. The 
 target application areas in this work are to use a micro lens array 
 (MLA) in a wavefront sensor, for optical aberrations quantification in 
 human eye diagnostics or adaptive optical system. This last one is 
 essential in astronomy applications in order to correct the aberrations 
 introduced by earth atmosphere. The fabricated FZP generates 
 illumination points with high contrast intensity in the focal plane, 
 which is the purpose of the wavefront sensor. This high-contrast image 
 suggests that the employed fabrication process is well controlled and it 
 matches the design parameters.},
note = {30th Symposium on Microelectronics Technology and Devices (SBMicro), 
 Salvador, BRAZIL, AUG 31-SEP 04, 2015},
keywords = {{Fresnel Zone Plate; Maskless Lithography; Diffractive Optics}},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{ISI:000378423000024,
title = {Limitations of Coupled Mode Theory to Model Coupled Microresonators 
 ``Dark States''},
author = {Guilherme F M de Rezende and Mario C M M Souza and Newton C Frateschi},
isbn = {978-1-4673-7162-9},
year  = {2015},
date = {2015-01-01},
booktitle = {2015 30TH SYMPOSIUM ON MICROELECTRONICS TECHNOLOGY AND DEVICES (SBMICRO)},
publisher = {IEEE},
address = {345 E 47TH ST, NEW YORK, NY 10017 USA},
organization = {Univ Fed Bahia; PET Engn Electrica; Sociedade Brasileira Computacao; 
 Sociedade Brasileira Microelectronica; IEEE Solid State Circuits Soc; 
 IEEE Elect Devices Soc; IFIP; CAPES; CNPq; SENAI CIMATEC},
abstract = {In this work we present analytical and experimental results indicating 
 that Coupled Mode Theory, unlike the Transfer Matrix Method, may have 
 limitations in predicting the behavior of photonic molecules based on 
 embedded coupled microring cavities. We show that this resonant 
 mode-based approach fails to provide the correct transmission spectrum 
 for some important coupled cavity configurations, although correctly 
 predicting the existence of these modes as eigenstates of the coupled 
 system. The measured transmission spectrum of a CMOS compatible tunable 
 photonic molecule is used to demonstrate this limitation.},
note = {30th Symposium on Microelectronics Technology and Devices (SBMicro), 
 Salvador, BRAZIL, AUG 31-SEP 04, 2015},
keywords = {{Microring Resonators; Coupled Mode Theory; Transfer Matrix Method;   Transmission Spectrum}},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{ISI:000370627101190,
title = {Tunable Spectral Engineering of Coupled Silicon Microcavities},
author = {Mario C M M Souza and Luis A M Barea and Antonio A G von Zuben and Gustavo S Wiederhecker and Newton C Frateschi},
issn = {2160-9020},
year  = {2015},
date = {2015-01-01},
booktitle = {2015 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)},
publisher = {IEEE},
address = {345 E 47TH ST, NEW YORK, NY 10017 USA},
series = {Conference on Lasers and Electro-Optics},
abstract = {We demonstrate the generation and control of optical resonance 
 mode-splitting arising from a single-notch resonance using coupled 
 silicon microring resonators with electrically controlled 
 counter-propagating mode excitation. (C) 2014 Optical Society of America},
note = {Conference on Lasers and Electro-Optics (CLEO), San Jose, CA, MAY 10-15, 
 2015},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
@conference{Souza2014,
title = {Low-power four-channel wavelength multicasting in embedded microring resonators},
author = {Souza, M.C.M.M. and Barea, L.A.M. and Vallini, F. and Rezende, G.F.M. and Wiederhecker, G.S. and Frateschi, N.C.},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84906872048&partnerID=40&md5=73603e4e63a74ea4e49bd3a060bd7e21},
year  = {2014},
date = {2014-01-01},
journal = {Optics InfoBase Conference Papers},
abstract = {We demonstrate four-channel all-optical wavelength multicasting using only 1 mW of pump power and channel spacing of 40-60 GHz. Our device is based on a compact embedded microring design fabricated on a scalable SOI platform. copyright 2014 OSA.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
@conference{Cirino2014,
title = {Two-dimensional diffraction grating fabricated by maskless lithography},
author = {Cirino, G.A.a and Montagnoli, A.N.a and Frateschi, N.C.b},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84912128126&partnerID=40&md5=fade1deb6521172cb5be18f44d35b1fc},
doi = {10.1109/SBMicro.2014.6940083},
year  = {2014},
date = {2014-01-01},
journal = {2014 29th Symposium on Microelectronics Technology and Devices: Chip in Aracaju, SBMicro 2014},
abstract = {This work presents the fabrication of a two-dimensional diffraction grating with light phase modulation. The device was designed by employing the Iterative Fourier Transform Algorithm and fabricated by maskless direct laser writing system. Optical characterization of the diffraction pattern shown a good matching between the fabricated device and its design. copyright 2014 IEEE.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
@conference{Jarschel2014,
title = {Enabling III-V integrated photonics with Er-doped Al2O3 films},
author = {Jarschel, P.F. and Souza, M.C.M.M. and Von Zuben, A.A.G. and Ramos, A.C. and Merlo, R.B. and Frateschi, N.C.},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84912096021&partnerID=40&md5=cfb8c09774019dbd7acc424d7ad3b907},
doi = {10.1109/SBMicro.2014.6940104},
year  = {2014},
date = {2014-01-01},
journal = {2014 29th Symposium on Microelectronics Technology and Devices: Chip in Aracaju, SBMicro 2014},
abstract = {We describe the integration of erbium-doped Al2O3 material with InGaAs/GaAs quantum well lasers emitting at 980 nm, demonstrating the possibility of integrating III-V based pumping lasers and materials suitable for optical amplification and planar photonics. Combining Er-doped materials with III-V compounds is challenging since ion activation usually requires high temperature annealing. In order to demonstrate the compatibility of the two material systems we fabricated laser samples using Er-doped Al2O3 films as insulating material. We compare annealed (800$,^circ$C) and non-annealed devices and show that laser performance is not affected by the high-temperature annealing. copyright 2014 IEEE.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
@conference{Barea201454,
title = {Photonic molecules for optical signal processing},
author = {Barea, L.A.M. and Souza, M.C.M.M. and Rezende, G.F.M. and Frateschi, N.C.},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84921264357&partnerID=40&md5=6c350094daa70a36ecd4b5cb8f7fd069},
doi = {10.1109/IPCon.2014.6995206},
year  = {2014},
date = {2014-01-01},
journal = {2014 IEEE Photonics Conference, IPC 2014},
pages = {54-55},
abstract = {We demonstrate how CMOS compatible photonic molecules (PM) can break the fundamental interdependence among quality factor (Q), channel spacing and size of microring resonators. Different PM architectures are presented for efficient and compact optical signal processing. copyright 2014 IEEE.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
@conference{Shane2014,
title = {Thermal considerations in electrically-pumped metallo-dielectric nanolasers},
author = {Shane, J.a and Gu, Q.a and Vallini, F.b and Wingad, B.a and Smalley, J.S.T.a and Frateschi, N.C.b and Fainman, Y.a},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84901799111&partnerID=40&md5=9e0b7466f3ad94b8b41e631dc8381f18},
doi = {10.1117/12.2057412},
year  = {2014},
date = {2014-01-01},
journal = {Proceedings of SPIE - The International Society for Optical Engineering},
volume = {8980},
abstract = {Metal nanocavity-based lasers show promise for dense integration in nanophotonic devices, thanks to their compact size and lack of crosstalk. Thermal considerations in these devices have been largely overlooked in design, despite the importance of self-heating and heat dissipation to device performance. We discuss the sources of self-heating in electrically-pumped wavelength-scale nanolasers, and the incorporation of these heat sources into a heat dissipation model to calculate laser operating temperature. We apply this thermal model to an example electrically-pumped nanolaser operating at room temperature. copyright 2014 SPIE.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
@article{Souza201410430,
title = {Embedded coupled microrings with high-finesse and close-spaced resonances for optical signal processing},
author = {Souza, M.C.M.M. and Barea, L.A.M. and Vallini, F. and Rezende, G.F.M. and Wiederhecker, G.S. and Frateschi, N.C.},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84899854737&partnerID=40&md5=7e75faaeebcfccc28776dcf2cc3635d9},
doi = {10.1364/OE.22.010430},
year  = {2014},
date = {2014-01-01},
journal = {Optics Express},
volume = {22},
number = {9},
pages = {10430-10438},
abstract = {Single microring resonators have been used in applications such as wavelength multicasting and microwave photonics, but the dependence of the free spectral range with ring radius imposes a trade-off between the required GHz optical channel spacing, footprint and power consumption. We demonstrate four-channel all-optical wavelength multicasting using only 1 mW of control power, with converted channel spacing of 40-60 GHz. Our device is based on a compact embedded microring design fabricated on a scalable SOI platform. The coexistence of close resonance spacing and high finesse (205) in a compact footprint is possible due to enhanced quality factors (30,000) resulting from the embedded configuration and the coupling-strength dependence of resonance spacing, instead of ring size. In addition, we discuss the possibility of achieving continuously mode splitting from a single-notch resonance up to 40 GHz. copyright 2014 Optical Society of America.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@conference{Gu2014,
title = {Electrically pumped metallo-dielectric pedestal nanolasers with amorphous Al2O3 shield},
author = {Gu, Q.a and Shane, J.a and Vallini, F.a and Wingad, B.a and Smalley, J.S.T.a and Frateschi, N.C.b and Fainman, Y.a},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84906074826&partnerID=40&md5=9ac0956ce95032736c698c849f049950},
year  = {2014},
date = {2014-01-01},
journal = {Optics InfoBase Conference Papers},
abstract = {We implement amorphous-Al2O3 as a thermally-conductive shield in metallo-dielectric nanolasers, and demonstrate an electrically pumped device. Joint consideration of various design parameters reveals that this design allows the laser to dissipate heat through its shield. copyright 2014 OSA.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
@conference{DoNascimento2014,
title = {Silicon nitride for nonlinear optics applications in the telecommunications C-band deposited by ECR-CVD},
author = {Do Nascimento, A.R., Jr.a and Manera, L.T.a b and Diniz, J.A.a b and Silva, A.R.a and Dos Santos, M.V.P.d and Arismar Cerqueira, S., Jr.c and Barea, L.A.M.d and Frateschi, N.C.d},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84912062536&partnerID=40&md5=4d1f68fa400e2b84d7b198819b63ad6b},
doi = {10.1109/SBMicro.2014.6940088},
year  = {2014},
date = {2014-01-01},
journal = {2014 29th Symposium on Microelectronics Technology and Devices: Chip in Aracaju, SBMicro 2014},
abstract = {Silicon nitride films deposited by low-pressure electron cyclotron resonance plasma enhanced chemical vapor deposition (ECR-CVD) at room temperature are proposed for nonlinear optics applications in the telecommunications C-band. Numerical simulations were performed to determine the relationship between refractive index and the waveguide minimum size in order to have the zero dispersion point at 1.55 μm. Silicon nitride films with large thickness, low roughness and high refractive index were obtained by varying deposition parameters, such as gas pressure (4-6 mTorr) and Si/N ratio. The Si-rich silicon nitride film developed for nonlinear applications with refractive index of 2, high deposition rate, low hydrogen concentration and low roughness was used for fabrication of nonlinear microring resonators. Using the deposition process at low temperature, the stress limitation in thick silicon nitride films was eliminated. copyright 2014 IEEE.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
@article{Gu2014499,
title = {Amorphous Al2O3 shield for thermal management in electrically pumped metallo-dielectric nanolasers},
author = {Gu, Q.a and Shane, J.a and Vallini, F.b and Wingad, B.a and Smalley, J.S.T.a and Frateschi, N.C.b and Fainman, Y.a},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84901332397&partnerID=40&md5=60c6d9b35f5a951fecb6ca959ac73556},
doi = {10.1109/JQE.2014.2321746},
year  = {2014},
date = {2014-01-01},
journal = {IEEE Journal of Quantum Electronics},
volume = {50},
number = {7},
pages = {499-509},
abstract = {We analyze amorphous Al2O3 (α-Al 2O3) for use as a thick thermally conductive shield in metallo-dielectric semiconductor nanolasers, and show that the use of (alpha ) -Al2O3 allows a laser to efficiently dissipate heat through its shield. This new mechanism for thermal management leads to a significantly lower operating temperature within the laser, compared with lasers with less thermally conductive shields, such as SiO2. We implement the shield in a continuous wave electrically pumped cavity, and analyze its experimental performance by jointly investigating its optical, electrical, thermal, and material gain properties. Our analysis shows that the primary obstacle to room temperature lasing was the device's high threshold gain. At the high pump levels required to achieve the gain threshold, particularly at room temperature, the gain spectrum broadened and shifted, leading to detrimental mode competition. Further simulations predict that an increase in the pedestal undercut depth should enable room temperature lasing in a device with the same footprint and gain volume. Through the integrated treatment of various physical effects, this analysis shows the promise of (α-Al2O3 for nanolaser thermal management, and enables better understanding of nanolaser behavior, as well as more informed design of reliable nanolasers. copyright 2014 IEEE.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@conference{Espinel2014,
title = {Brillouin scattering in silicon slotwaveguides},
author = {Espinel, Y.A.V. and Alegre, T.P.M. and Wiederhecker, G.S.},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84905403460&partnerID=40&md5=b173e0b15e13104d088736fdaebbdd21},
year  = {2014},
date = {2014-01-01},
journal = {Optics InfoBase Conference Papers},
abstract = {Here we numerically investigate Brillouin scattering (BS) in a silicon slot waveguide. We show that BS is strongly influenced by the boundary effects, instead of the usual photo-elastic effect leading to the interaction with distinct mechanical modes. copyright 2014 Optical Society of America.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
@article{Zhang2014,
title = {Eliminating anchor loss in optomechanical resonators using elastic wave interference},
author = {Zhang, M.a and Luiz, G.b and Shah, S.a and Wiederhecker, G.b and Lipson, M.a c},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84905671257&partnerID=40&md5=548b8970d7257673a286f6684b0406c3},
doi = {10.1063/1.4892417},
year  = {2014},
date = {2014-01-01},
journal = {Applied Physics Letters},
volume = {105},
number = {5},
abstract = {Optomechanical resonators suffer from the dissipation of mechanical energy through the necessary anchors enabling the suspension of the structure. Here, we show that such structural loss in an optomechanical oscillator can be almost completely eliminated through the destructive interference of elastic waves using dual-disk structures. We also present both analytical and numerical models that predict the observed interference of elastic waves. Our experimental data reveal unstressed silicon nitride (Si3N4) devices with mechanical Q-factors up to 104 at mechanical frequencies of f=102 MHz (fQ=1012) at room temperature. copyright 2014 AIP Publishing LLC.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@conference{Gu2014524,
title = {Electrically pumped metallo-dielectric pedestal nanolasers with high thermal-conductivity shield},
author = {Gu, Q.a and Shane, J.a and Vallini, F.a and Smalley, J.S.T.a and Frateschi, N.C.b and Fainman, Y.a},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84921321816&partnerID=40&md5=7efb38116d9ae8d624852aae53c7f6af},
doi = {10.1109/IPCon.2014.6995481},
year  = {2014},
date = {2014-01-01},
journal = {2014 IEEE Photonics Conference, IPC 2014},
pages = {524-525},
abstract = {We implement amorphous-Al2O3 as thermally-conductive shield in metallo-dielectric nanolasers, and demonstrate an electrically pumped device. Joint consideration of various design parameters reveals that this design allows the laser to dissipate heat through its shield, aiding thermal management in nanoscale devices. copyright 2014 IEEE.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
@inproceedings{ISI:000369908601475,
title = {Brillouin Scattering in Silicon Slot Waveguides},
author = {Yovanny A V Espinel and Thiago P M Alegre and Gustavo S Wiederhecker},
issn = {2160-9020},
year  = {2014},
date = {2014-01-01},
booktitle = {2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)},
publisher = {IEEE},
address = {345 E 47TH ST, NEW YORK, NY 10017 USA},
series = {Conference on Lasers and Electro-Optics},
abstract = {Here we numerically investigate Brillouin scattering (BS) in a silicon 
 slot waveguide. We show that BS is strongly influenced by the boundary 
 effects, instead of the usual photo-elastic effect leading to the 
 interaction with distinct mechanical modes. (C) 2014 Optical Society of 
 America},
note = {Conference on Lasers and Electro-Optics (CLEO), San Jose, CA, JUN 08-13, 
 2014},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
@inproceedings{ISI:000369908603369,
title = {Low-power four-channel wavelength multicasting in embedded microring 
 resonators},
author = {Mario C M M Souza and Luis A M Barea and Felipe Vallini and Guilherme F M Rezende and Gustavo S Wiederhecker and Newton C Frateschi},
issn = {2160-9020},
year  = {2014},
date = {2014-01-01},
booktitle = {2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)},
publisher = {IEEE},
address = {345 E 47TH ST, NEW YORK, NY 10017 USA},
series = {Conference on Lasers and Electro-Optics},
abstract = {We demonstrate four-channel all-optical wavelength multicasting using 
 only 1 mW of pump power and channel spacing of 40-60 GHz. Our device is 
 based on a compact embedded microring design fabricated on a scalable 
 SOI platform.},
note = {Conference on Lasers and Electro-Optics (CLEO), San Jose, CA, JUN 08-13, 
 2014},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
@article{vallini_carrier_2013,
title = {Carrier saturation in multiple quantum well metallo-dielectric semiconductor nanolaser: Is bulk material a better choice for gain media?},
author = {Vallini, Felipe and Gu, Qing and Kats, Michael and Fainman, Yeshaiahu and Frateschi, Newton C.},
url = {http://www.opticsinfobase.org/oe/fulltext.cfm?uri=oe-21-22-25985&id=269975},
issn = {1094-4087},
year  = {2013},
date = {2013-01-01},
urldate = {2014-05-14},
journal = {Optics Express},
volume = {21},
number = {22},
pages = {25985},
abstract = {Although multi quantum well (MQW) structure is frequently 
suggested as the appropriate medium for providing optical gain in 
nanolasers with low threshold current, we demonstrate that in general bulk 
gain medium can be a better choice. We show that the high threshold gain 
required for nanolasers demands high threshold carrier concentrations and 
therefore a highly degenerate condition in which the barriers between the 
quantum wells are heavily pumped. As a result, there occurs spontaneous 
emission from the barrier in very dissipative low Q modes or undesired 
confined higher Q modes with resonance wavelengths close to the barrier 
bandgap. This results in a competition between wells and barriers that 
suppresses lasing. A complete model involving the optical properties of the 
resonant cavity combined with the carrier injection in the multilayer 
structure is presented to support our argument. With this theoretical model 
we show that while lasing is achieved in the nanolaser with bulk gain 
media, the nanolaser with MQW gain structure exhibits well emission 
saturation due to the onset of barrier emission.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{malheiros-silveira_dielectric_2013,
title = {Dielectric resonator antenna for applications in nanophotonics},
author = {Malheiros-Silveira, Gilliard N. and Wiederhecker, Gustavo S. and Hern{'a}ndez-Figueroa, Hugo E.},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-21-1-1234},
year  = {2013},
date = {2013-01-01},
urldate = {2014-05-14},
journal = {Optics Express},
volume = {21},
number = {1},
pages = {1234--1239},
abstract = {Optical nanoantennas, especially of the dipole type, have been theoretically and experimentally demonstrated by many research groups. Likewise, the plasmonic waveguides and optical circuits have experienced significant advances. In radio frequencies and microwaves a category of antenna known as dielectric resonator antenna (DRA), whose radiant element is a dielectric resonator (DR), has been designed for several applications, including satellite and radar systems. In this letter, we explore the possibilities and advantages to design nano DRAs (NDRAs), i. e., DRAs for nanophotonics applications. Numerical demonstrations showing the fundamental antenna parameters for a circular cylindrical NDRA type have been carried out for the short (S), conventional (C), and long (L) bands of the optical communication spectrum.},
keywords = {Metal optics, Optical resonators, plasmonics, Radiation},
pubstate = {published},
tppubtype = {article}
}
@conference{gu_electrically_2013,
title = {Electrically pumped metallo-dielectric pedestal nanolasers},
author = {Gu, Qing and Wingad, B. and Vallini, F. and Slutsky, B. and Katz, M. and Nezhad, M.P. and Frateschi, N.C. and Fainman, Y.},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/Gu-et-al.-2013-Electrically-pumped-metallo-dielectric-pedestal-na1.pdf},
year  = {2013},
date = {2013-01-01},
booktitle = {2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)},
pages = {1--2},
abstract = {Electrically pumped metallo-dielectric nanolasers are demonstrated. Employing a two-step InP chemical etching, we obtain straight pedestal sidewalls and preferentially reduce the diameter of the n-doped InP cladding more than the p-doped one for optimized performance.},
keywords = {Cavity resonators, cladding, claddings, electrical pump, etching, Indium phosphide, metallo-dielectric pedestal nanolasers, nanophotonics, Optical pumping, Performance evaluation, Pump lasers, Semiconductor lasers, two-step chemical etching, {InP}},
pubstate = {published},
tppubtype = {conference}
}
@conference{zhang_eliminating_2013,
title = {Eliminating Structural Loss in Optomechanical Resonators Using Elastic Wave Interference},
author = {Zhang, Mian and Luiz, Gustavo O. and Shah, Shreyas and Nussenzveig, Paulo A. and Wiederhecker, Gustavo S. and Lipson, Michal},
url = {http://www.opticsinfobase.org/abstract.cfm?URI=CLEO_SI-2013-CW1F.6},
year  = {2013},
date = {2013-01-01},
urldate = {2014-05-14},
booktitle = {CLEO: 2013},
pages = {CW1F.6},
publisher = {Optical Society of America},
series = {OSA Technical Digest (online)},
abstract = {We theoretically and experimentally demonstrate that the support loss of double-disk optomechanical resonators can be minimized using destructive elastic wave interference. We show 100MHz Si3N4 resonators with mechanical quality factor of 10000 at room temperature.},
keywords = {Micro-optical devices, Optical microelectromechanical devices},
pubstate = {published},
tppubtype = {conference}
}
@conference{alberto_mijam_barea_enhanced_2013,
title = {Enhanced Q with Internally Coupled Microring Resonators},
author = {Alberto Mijam Barea, Luis and Vallini, Felipe and P. Mayer Alegre, Thiago and S. Wiederhecker, Gustavo and Cesario Frateschi, Newton},
url = {http://www.opticsinfobase.org/abstract.cfm?URI=CLEO_AT-2013-JTu4A.42},
year  = {2013},
date = {2013-01-01},
urldate = {2014-05-14},
booktitle = {CLEO: 2013},
pages = {JTu4A.42},
publisher = {Optical Society of America},
abstract = {We demonstrate fourfold quality factor (Q) enhancement with microring resonators internally coupled to larger microring resonator. Q textasciitilde 37,000 is obtained for a 5 μm radius microring in a 40 μm x 40 μm footprint device.},
keywords = {Integrated optics devices, Photonic integrated circuits, Resonators},
pubstate = {published},
tppubtype = {conference}
}
@conference{jarschel_erbium_2013,
title = {Erbium Doped Al2O3 films for integrated III #x2013;V photonics},
author = {Jarschel, P.F. and Barea, L.A.M. and Souza, M.C.M.M. and Vallini, F. and Von Zuben, A.A.G. and Ramos, A.C. and Merlo, R.B. and Frateschi, N.C.},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/Jarschel-et-al.-2013-Erbium-Doped-Al2O3-films-for-integrated-III-x2013.pdf},
year  = {2013},
date = {2013-01-01},
booktitle = {2013 Symposium on Microelectronics Technology and Devices (SBMicro)},
pages = {1--4},
abstract = {We describe the fabrication optimization of Er-doped Al2O3 films for III-V integrated photonics. Smooth and thick films, with high refractive index and Erbium emission in the C-band spectrum (1530 nm to 1565 nm) are obtained using the co-sputtering technique. Thermal annealing at 850 $,^circ$C is shown to provide the highest Photoluminescence intensity of the films. However, the onset of crystallization leads to large fluctuation in refractive index. We also show that the annealing at temperatures larger than 600 $,^circ$C causes well intermixing in the laser structure. Therefore, local annealing and/or a reduction in annealing temperature may be required. Alumina waveguides are fabricated by the same technique, but the process have to be improved, as optical losses are very high.},
keywords = {alumina, alumina waveguides, annealing, annealing temperature, C-band spectrum, cosputtering technique, crystallization, erbium, Erbium doped, Erbium emission, fabrication optimization, integrated photonics, integrated {III}-V photonics, intermixing, laser structure, optical amplifier, optical losses, photoluminescence intensity, Refractive index, thermal annealing, thick films, waveguide, {III}--V},
pubstate = {published},
tppubtype = {conference}
}
@phdthesis{vallini_nanolasers_2013,
title = {Nanolasers de semicondutor met'alico-diel'etrico com bombeio eletr^onico : a influ^encia do meio de ganho},
author = {Vallini, Felipe and Frateschi, Newton Cesario},
url = {http://www.bibliotecadigital.unicamp.br/document/?code=000917601&opt=1},
year  = {2013},
date = {2013-01-01},
urldate = {2014-05-14},
abstract = {Resumo: Neste trabalho s~ao investigados os nanolasers de semicondutor do tipo met'alico-diel'etrico com injec c~ao eletr^onica. Com o uso de softwares robustos otimizamos as propriedades eletromagn'eticas das cavidades propostas atrav'es da soluc c~ao das equac c~oes de Maxwell em um meio material. Tamb'em resolvemos auto-consistentemente as equac c~oes de Poisson, de continuidade, de transporte e de Schroedinger para obter as propriedades eletr^onicas da cavidade. Tal otimizac c~ao, considerando a parte de confinamento do modo em conjunto com a parte da injec c~ao eletr^onica nunca havia sido proposta ou realizada para nanolasers. Estudamos o efeito do meio de ganho em um nanolaser desse tipo atrav'es da comparac c~ao do desempenho de um nanolaser com meio de ganho bulk e outro com meio de ganho de m'ultiplos poc cos qu^anticos. Essa an'alise foi feita inserindo um modelo de reservat'orio de portadores `as equac c~oes de taxa convencionais para nanolasers. Fabricamos dois nanolasers, um com cada meio de ganho. Os nanolasers foram caracterizados e demonstramos que um meio de ganho bulk 'e mais adequado ao desenvolvimento de nanolasers de semicondutor met'alico-diel'etrico com bombeio eletr^onico. Por fim, medimos um nanolaser com meio de ganho bulk a 77 K, o qual apresentou uma corrente de limiar da ordem de 2 mA, emiss~ao em 1567 nm e largura de linha de 0.4 nm. 
 
Abstract: In this work we have investigated metallo-dielectric semiconductor nanolasers with electronic pumping. We have optimized the electromagnetic properties of the proposed cavities through the solution of Maxwell equations in a material media using robust software. We also solved self-consistently Poisson, continuity, transport and Schrodinger equations to obtain the electronic properties of the cavities. Such optimization, which considers the optical mode confinement together with the electronic injection, had not been proposed or realized for nanolasers yet. We have studied the effect of the gain media in this class of nanolaser comparing the performance of a nanolaser with bulk gain media and a nanolaser with multiple quantum wells gain media. This analysis was done inserting a reservoir model for carriers into conventional laser rate equations. We have fabricated two nanolasers, each one with one of the proposed gain media. The nanolasers were measured and we demonstrated that a bulk gain media is more suitable for the development of metallo-dielectric semiconductor nanolasers with electronic pumping. Finally, we have measured a bulk gain media nanolaser at 77 K, with a threshold current of 2 mA, emission at 1567 nm and a linewidth of 0.4 nm.},
keywords = {Bulk, Constitutional and consumerists proving garantees, Electronic injection, Inje{c c}{~a}o eletr{^o}nica, Nanolaser de semicondutor, Po{c c}os qu{^a}nticos, Quantum wells, Semiconductor nanolaser},
pubstate = {published},
tppubtype = {phdthesis}
}
@article{gu_purcell_2013,
title = {Purcell effect in sub-wavelength semiconductor lasers},
author = {Gu, Qing and Slutsky, Boris and Vallini, Felipe and Smalley, Joseph S. T. and Nezhad, Maziar P. and Frateschi, Newton C. and Fainman, Yeshaiahu},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-21-13-15603},
year  = {2013},
date = {2013-01-01},
urldate = {2014-05-14},
journal = {Optics Express},
volume = {21},
number = {13},
pages = {15603--15617},
abstract = {We present a formal treatment of the modification of spontaneous emission rate by a cavity (Purcell effect) in sub-wavelength semiconductor lasers. To explicitly express the assumptions upon which our formalism builds, we summarize the results of non-relativistic quantum electrodynamics (QED) and the emitter-field-reservoir model in the quantum theory of damping. Within this model, the emitter-field interaction is modified to the extent that the field mode is modified by its environment. We show that the Purcell factor expressions frequently encountered in the literature are recovered only in the hypothetical condition when the gain medium is replaced by a transparent medium. Further, we argue that to accurately evaluate the Purcell effect, both the passive cavity boundary and the collective effect of all emitters must be included as part of the mode environment.},
keywords = {Microcavity devices, Quantum electrodynamics, Semiconductor lasers},
pubstate = {published},
tppubtype = {article}
}
@article{barea_silicon_2013,
title = {Silicon technology compatible photonic molecules for compact optical signal processing},
author = {Barea, Luis A. M. and Vallini, Felipe and Jarschel, Paulo F. and Frateschi, Newton C.},
url = {http://scitation.aip.org/content/aip/journal/apl/103/20/10.1063/1.4829743},
issn = {0003-6951, 1077-3118},
year  = {2013},
date = {2013-01-01},
urldate = {2014-05-14},
journal = {Applied Physics Letters},
volume = {103},
number = {20},
pages = {201102},
abstract = {Photonic molecules (PMs) based on multiple inner coupled microring resonators allow to surpass the fundamental constraint between the total quality factor (QT), free spectral range (FSR), and resonator size. In this work, we use a PM that presents doublets and triplets resonance splitting, all with high QT. We demonstrate the use of the doublet splitting for 34.2 GHz signal extraction by filtering the sidebands of a modulated optical signal. We also demonstrate that very compact optical modulators operating 2.75 times beyond its resonator linewidth limit may be obtained using the PM triplet splitting, with separation of ∼55 GHz.},
keywords = {Absorption spectra, Coupled resonators, Linewidths, Metal insulator semiconductor structures, Optical resonators},
pubstate = {published},
tppubtype = {article}
}
@article{barea_spectral_2013,
title = {Spectral Engineering With CMOS Compatible SOI Photonic Molecules},
author = {Barea, L.A.M. and Vallini, F. and de Rezende, G.F.M. and Frateschi, N.C.},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/Barea-et-al.-2013-Spectral-Engineering-With-CMOS-Compatible-SOI-Phot.pdf},
issn = {1943-0655},
year  = {2013},
date = {2013-01-01},
journal = {IEEE Photonics Journal},
volume = {5},
number = {6},
pages = {2202717--2202717},
abstract = {Photonic systems based on microring resonators have a fundamental constraint given by the strict relationship among free spectral range, total quality factor QT , and resonator size, intrinsically making filter spacing, photonic lifetime, and footprint interdependent. Here, we break this paradigm employing CMOS-compatible silicon-on-insulator photonic molecules based on coupled multiple inner ring resonators. The resonance wavelengths and their respective linewidths are controlled by the hybridization of the quasi-orthogonal photonic states. We demonstrate photonic molecules with doublet and triplet resonances with spectral splitting only achievable with single-ring orders of magnitude larger in footprint. In addition, this splitting is potentially controllable based on the coupling (bonds) between resonators. Finally, the spatial distribution of the hybrid states allows up to sevenfold QT enhancement.},
keywords = {Cavity resonators, Couplings, Electric fields, filter spacing, integrated optics, microring resonators, Optical resonators, Optical ring resonators, photonic lifetime, photonic molecules, photonic systems, Photonics, Q-factor, quality factor, quasi-orthogonal photonic states, Silicon nanophotonics, silicon-on-insulator, spectral engineering, waveguide devices, {CMOS}, {CMOS} integrated circuits, {SOI}},
pubstate = {published},
tppubtype = {article}
}
@conference{zhang_strong_2013,
title = {Strong Interaction between a Single Carbon Nanotube and an Optical Microresonator},
author = {Zhang, Mian and Barnard, Arthur and Wiederhecker, Gustavo S. and McEuen, Paul L. and Lipson, Michal},
url = {http://www.opticsinfobase.org/abstract.cfm?URI=CLEO_QELS-2013-QM1B.1},
year  = {2013},
date = {2013-01-01},
urldate = {2014-05-14},
booktitle = {CLEO: 2013},
pages = {QM1B.1},
publisher = {Optical Society of America},
series = {OSA Technical Digest (online)},
abstract = {We couple a single suspended carbon nanotube to the near field of a free standing optical microdisk. The strong interaction between the nanotube and the microcavity produces an ultrahigh photocurrent response as large as 0.35mA/W.},
keywords = {Micro-optical devices, Optoelectronics},
pubstate = {published},
tppubtype = {conference}
}
@article{jiang_electromagnetically_2013,
title = {Electromagnetically induced transparency and slow light in two-mode optomechanics},
author = {Jiang, Cheng and Liu, Hongxiang and Cui, Yuanshun and Li, Xiaowei and Chen, Guibin and Chen, Bin},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-21-10-12165},
year  = {2013},
date = {2013-01-01},
urldate = {2014-05-14},
journal = {Optics Express},
volume = {21},
number = {10},
pages = {12165--12173},
abstract = {We theoretically demonstrate the mechanically mediated electromagnetically induced transparency in a two-mode cavity optomechanical system, where two cavity modes are coupled to a common mechanical resonator. When the two cavity modes are driven on their respective red sidebands by two pump beams, a transparency window appears in the probe transmission spectrum due to destructive interference. Under this situation the transmitted probe beam can be delayed as much as 4 μs, which can be easily controlled by the power of the pump beams.},
keywords = {Coherent optical effects, Microcavities},
pubstate = {published},
tppubtype = {article}
}
@article{lang_highly_2012,
title = {Highly luminescent a-SiO x〈ER〉/SiO 2/Si multilayer structure},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/06215006.pdf},
year  = {2012},
date = {2012-08-01},
volume = {4},
abstract = {We have fabricated highly luminescent samples with erbium-doped amorphous silicon suboxide (a-SiO x 〈Er〉) layers on SiO 2/Si substrates. The layers are designed to provide a resonance with large modal overlap with the active material and with low quality factor (Q-factor) at 1540 nm. Also, the structure has higher Q-factor resonances in the wavelength range between 800 and 1000 nm. Within this range, strong light emission from a-SiO x defect-related radiative centers and emission from the Er 3+ 4I 11/2 - 4I 15/2 optical transition (980 nm) are observed. A twofold and fourfold improvement in photoluminescence (PL) intensity are achieved in the wavelength ranges between 800 and 1000 nm and between 1500 and 1600 nm (region of Er 3+ 4I 13/2 - 4I 15/2 transition), respectively, when compared to the a-SiO x 〈Er〉 active material deposited directly on Si substrate. The latter higher PL intensity enhancement is apparently caused by optical pumping at 980 nm (higher Q-factor) with subsequent emission from the 4I 15/2 level in the low Q-factor resonance at 1540 nm. Further, five times increase of this emission at 1540 nm is obtained after optimized temperature annealing. The temperature-induced quenching in the PL intensity indicates distinct deactivation energies related to different types of Er centers which are more or less coupled to defects depending on the thermal treatment temperature copyright 2009-2012 IEEE.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{figueira_-siox<er>_2012,
title = {a-SiOxtextlessErtextgreater active photonic crystal resonator membrane fabricated by focused Ga+ ion beam},
author = {Figueira, David S. L. and Barea, Luis A. M. and Vallini, Felipe and Jarschel, Paulo F. and Lang, Rossano and Frateschi, Newton C.},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-20-17-18772},
year  = {2012},
date = {2012-01-01},
urldate = {2014-05-14},
journal = {Optics Express},
volume = {20},
number = {17},
pages = {18772--18783},
abstract = {We have fabricated thin erbium-doped amorphous silicon sub-oxide (a-SiOxtextlessErtextgreater) photonic crystal membrane using focused gallium ion beam (FIB). The photonic crystal is composed of a hexagonal lattice with a H1 defect supporting two quasi-doubly degenerate second order dipole states. 2-D simulation was used for the design of the structure and full 3-D FDTD (Finite-Difference Time-Domain) numerical simulations were performed for a complete analysis of the structure. The simulation predicted a quality factor for the structure of Q = 350 with a spontaneous emission enhancement of 7. Micro photoluminescence measurements showed an integrated emission intensity enhancement of textasciitilde2 times with a Q = 130. We show that the discrepancy between simulation and measurement is due to the conical shape of the photonic crystal holes and the optical losses induced by FIB milling.},
keywords = {Photonic crystals, Resonators},
pubstate = {published},
tppubtype = {article}
}
@article{menezes_comparison_2012,
title = {Comparison of Plasmonic Arrays of Holes Recorded by Interference Lithography and Focused Ion Beam},
author = {Menezes, J. W. and Barea, L. A M and Chillcce, E. F. and Frateschi, N. and Cescato, L.},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/Menezes-et-al.-2012-Comparison-of-Plasmonic-Arrays-of-Holes-Recorded-b.pdf},
issn = {1943-0655},
year  = {2012},
date = {2012-01-01},
journal = {IEEE Photonics Journal},
volume = {4},
number = {2},
pages = {544--551},
abstract = {In this paper, we compare the geometric characteristics and the optical properties of plasmonic hole arrays recorded in gold (Au) films using two different techniques, namely, focused ion beam (FIB) and interference lithography (IL). The morphology of the samples was analyzed using a scanning electron microscope (SEM), and the plasmonic peaks were measured from the transmission spectrum of the samples. The diameters of the holes recorded by IL present approximately the same statistical deviation as those fabricated by FIB but in a much larger area. Although the transmittance measurements of both types of samples exhibit the characteristic plasmonic peaks, the intrinsic fabrication errors of each technique affect differently the optical spectra.},
keywords = {Au, Fabrication, focused ion beam, focused ion beam technology, geometric characteristics, gold, gold films, infrared spectra, Interference, interference lithography, intrinsic fabrication errors, Ion beams, Lithography, metallic thin films, morphology, optical properties, photolithography, plasmonic hole arrays, plasmonics, Plasmons, Resists, scanning electron microscopy, statistical deviation, Substrates, transmission spectrum, ultraviolet spectra, ultraviolet-visible-infrared optical spectra, visible spectra, {FIB}, {SEM}},
pubstate = {published},
tppubtype = {article}
}
@article{moreau_highly-sensitive_2012,
title = {Highly-sensitive and label-free indium phosphide biosensor for early phytopathogen diagnosis},
author = {Moreau, Alberto L. D. and Janissen, Richard and Santos, Clelton A. and Peroni, Luis A. and Stach-Machado, Dagmar R. and de Souza, Alessandra A. and de Souza, Anete P. and Cotta, M{^o}nica A.},
url = {http://www.sciencedirect.com/science/article/pii/S0956566312002084},
issn = {0956-5663},
year  = {2012},
date = {2012-01-01},
urldate = {2014-05-14},
journal = {Biosensors and Bioelectronics},
volume = {36},
number = {1},
pages = {62--68},
abstract = {The development of highly-sensitive and label-free operating semiconductor-based, biomaterial detecting sensors has important applications in areas such as environmental science, biomedical research and medical diagnostics. In the present study, we developed an Indium Phosphide (InP) semiconductor-based resistive biosensor using the change of its electronic properties upon biomaterial adsorption as sensing element. To detect biomaterial at low concentrations, the procedure of functionalization and covalent biomolecule immobilization was also optimized to guarantee high molecule density and high reproducibility which are prerequisite for reliable results. The characterization, such as biomolecular conjugation efficiency, detection concentration limits, receptor:ligand specificity and concentration detection range was analyzed by using three different biological systems: i) synthetic dsDNA and two phytopathogenic diseases, ii) the severe CB-form of Citrus Tristeza Virus (CTV) and iii) Xylella fastidiosa, both causing great economic loss worldwide. The experimental results show a sensitivity of 1 pM for specific ssDNA detection and about 2 nM for the specific detection of surface proteins of CTV and X. fastidiosa phytopathogens. A brief comparison with other semiconductor based biosensors and other methodological approaches is discussed and confirms the high sensitivity and reproducibility of our InP based biosensor which could be suitable for reliable early infection diagnosis in environmental and life sciences.},
keywords = {Chemical functionalization, Citrus Tristeza Virus, Field-effect transistor, Immunosensor, Phytopathogen, Xylella fastidiosa},
pubstate = {published},
tppubtype = {article}
}
@article{safavi-naeini_observation_2012,
title = {Observation of Quantum Motion of a Nanomechanical Resonator},
author = {Safavi-Naeini, Amir H. and Chan, Jasper and Hill, Jeff T. and Alegre, Thiago P. Mayer and Krause, Alex and Painter, Oskar},
url = {http://link.aps.org/doi/10.1103/PhysRevLett.108.033602},
year  = {2012},
date = {2012-01-01},
urldate = {2014-05-14},
journal = {Physical Review Letters},
volume = {108},
number = {3},
pages = {033602},
abstract = {In this Letter we use resolved sideband laser cooling to cool a mesoscopic mechanical resonator to near its quantum ground state (phonon occupancy 2.6$pm$0.2), and observe the motional sidebands generated on a second probe laser. Asymmetry in the sideband amplitudes provides a direct measure of the displacement noise power associated with quantum zero-point fluctuations of the nanomechanical resonator, and allows for an intrinsic calibration of the phonon occupation number.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{luo_power_2012,
title = {Power insensitive silicon microring resonators},
author = {Luo, Lian-Wee and Wiederhecker, Gustavo S. and Preston, Kyle and Lipson, Michal},
url = {http://ol.osa.org/abstract.cfm?URI=ol-37-4-590},
year  = {2012},
date = {2012-01-01},
urldate = {2014-05-14},
journal = {Optics Letters},
volume = {37},
number = {4},
pages = {590--592},
abstract = {We demonstrate power insensitive silicon microring resonators without the need for active feedback control. The passive control of the resonance is achieved by utilizing the compensation of two counteracting processes, free carrier dispersion blueshift and thermo-optic redshift. In the fabricated devices, the resonant wavelength shifts less than one resonance linewidth for dropped power up to 335 μW, more than fivefold improvement in cavity energy handling capability compared to regular microrings.},
keywords = {Bistability, Resonators},
pubstate = {published},
tppubtype = {article}
}
@article{fegadolli_reconfigurable_2012,
title = {Reconfigurable silicon thermo-optical ring resonator switch based on Vernier effect control},
author = {Fegadolli, William S. and Vargas, German and Wang, Xuan and Valini, Felipe and Barea, Luis A. M. and Oliveira, Jos{'e} E. B. and Frateschi, Newton and Scherer, Axel and Almeida, Vilson R. and Panepucci, Roberto R.},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-20-13-14722},
year  = {2012},
date = {2012-01-01},
urldate = {2014-05-14},
journal = {Optics Express},
volume = {20},
number = {13},
pages = {14722--14733},
abstract = {A proof-of-concept for a new and entirely CMOS compatible thermo-optic reconfigurable switch based on a coupled ring resonator structure is experimentally demonstrated in this paper. Preliminary results show that a single optical device is capable of combining several functionalities, such as tunable filtering, non-blocking switching and reconfigurability, in a single device with compact footprint (textasciitilde50μm x 30μm).},
keywords = {Coupled resonators, Integrated optics devices, Thermo-optical materials},
pubstate = {published},
tppubtype = {article}
}
@conference{zhang_synchronization_2012,
title = {Synchronization of coupled optomechanical oscillators},
author = {Zhang, Mian and Wiederhecker, G.S. and Manipatruni, S. and Barnard, A. and McEuen, P.L. and Lipson, M.},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/Zhang-et-al.-2012-Synchronization-of-coupled-optomechanical-oscillat.pdf},
year  = {2012},
date = {2012-01-01},
booktitle = {2012 Conference on Lasers and Electro-Optics (CLEO)},
pages = {1--2},
abstract = {We demonstrate experimentally the synchronization of two micromechanical oscillators actuated by the optical radiation field. The mutual coupling is purely optical and fully tunable. Upon synchronization, the phase noise drops in agreement with the prediction.},
keywords = {actuator, coupled optomechanical oscillators, micro-optomechanical devices, microactuators, micromechanical oscillators, mutual coupling, Nonlinear optics, optical couplers, Optical coupling, optical radiation field, Optical signal processing, Optical surface waves, Oscillators, phase noise, Resonant frequency, synchronisation, Synchronization},
pubstate = {published},
tppubtype = {conference}
}
@article{zhang_synchronization_2012-1,
title = {Synchronization of Micromechanical Oscillators Using Light},
author = {Zhang, Mian and Wiederhecker, Gustavo S. and Manipatruni, Sasikanth and Barnard, Arthur and McEuen, Paul and Lipson, Michal},
url = {http://link.aps.org/doi/10.1103/PhysRevLett.109.233906},
year  = {2012},
date = {2012-01-01},
urldate = {2014-05-14},
journal = {Physical Review Letters},
volume = {109},
number = {23},
pages = {233906},
abstract = {Synchronization, the emergence of spontaneous order in coupled systems, is of fundamental importance in both physical and biological systems. We demonstrate the synchronization of two dissimilar silicon nitride micromechanical oscillators, that are spaced apart by a few hundred nanometers and are coupled through an optical cavity radiation field. The tunability of the optical coupling between the oscillators enables one to externally control the dynamics and switch between coupled and individual oscillation states. These results pave a path toward reconfigurable synchronized oscillator networks.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@conference{luo_tailored_2012,
title = {Tailored resonance dependence on input optical power in silicon microring resonators},
author = {Luo, Lian-Wee and Wiederhecker, G.S. and Preston, K. and Lipson, M.},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/Luo-et-al.-2012-Tailored-resonance-dependence-on-input-optical-pow.pdf},
year  = {2012},
date = {2012-01-01},
booktitle = {Photonics Global Conference (PGC), 2012},
pages = {1--3},
abstract = {We demonstrate the ability to tailor the resonance dependence on input power in silicon microring resonators using a passive technique by utilizing two counteracting processes, free carrier dispersion blueshift and thermo-optic redshift. In our fabricated silicon microring resonators, we achieve an effective blueshift, as well as effective redshift. We also design and fabricate a power insenstive silicon microring that has a five-fold improvement in cavity energy handling capability compared to a regular microring.},
keywords = {cavity energy handling capability, Continuous wavelet transforms, counteracting process, elemental semiconductors, Energy measurement, free carrier dispersion blueshift, input optical power, Lead, micro-optomechanical devices, Microcavities, micromechanical resonators, optical design, optical design techniques, optical dispersion, optical fabrication, Optical resonators, passive technique, power-insensitive silicon microring resonators, red shift, Si, silicon, Substrates, tailored resonance dependence, thermo-optic redshift, thermo-optical devices, Weaving},
pubstate = {published},
tppubtype = {conference}
}
@article{zhang_synchronization_2012b,
title = {Synchronization of Micromechanical Oscillators Using Light},
author = {Zhang, Mian and Wiederhecker, Gustavo S. and Manipatruni, Sasikanth and Barnard, Arthur and McEuen, Paul and Lipson, Michal},
url = {http://link.aps.org/doi/10.1103/PhysRevLett.109.233906},
year  = {2012},
date = {2012-01-01},
urldate = {2014-05-14},
journal = {Physical Review Letters},
volume = {109},
number = {23},
pages = {233906},
abstract = {Synchronization, the emergence of spontaneous order in coupled systems, is of fundamental importance in both physical and biological systems. We demonstrate the synchronization of two dissimilar silicon nitride micromechanical oscillators, that are spaced apart by a few hundred nanometers and are coupled through an optical cavity radiation field. The tunability of the optical coupling between the oscillators enables one to externally control the dynamics and switch between coupled and individual oscillation states. These results pave a path toward reconfigurable synchronized oscillator networks.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{winger_chip-scale_2011,
title = {A chip-scale integrated cavity-electro-optomechanics platform},
author = {Winger, M. and Blasius, T. D. and Mayer Alegre, T. P. and Safavi-Naeini, A. H. and Meenehan, S. and Cohen, J. and Stobbe, S. and Painter, O.},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-19-25-24905},
year  = {2011},
date = {2011-01-01},
urldate = {2014-05-14},
journal = {Optics Express},
volume = {19},
number = {25},
pages = {24905--24921},
abstract = {We present an integrated optomechanical and electromechanical nanocavity, in which a common mechanical degree of freedom is coupled to an ultrahigh-Q photonic crystal defect cavity and an electrical circuit. The system allows for wide-range, fast electrical tuning of the optical nanocavity resonances, and for electrical control of optical radiation pressure back-action effects such as mechanical amplification (phonon lasing), cooling, and stiffening. These sort of integrated devices offer a new means to efficiently interconvert weak microwave and optical signals, and are expected to pave the way for a new class of micro-sensors utilizing optomechanical back-action for thermal noise reduction and low-noise optical read-out.},
keywords = {Filters, Integrated optics devices, Interference, Modulators, Nanophotonics and photonic crystals, Optical microelectromechanical devices, Optical sensing and sensors, Optomechanics, Photonic crystals},
pubstate = {published},
tppubtype = {article}
}
@article{vallini_analysis_2011,
title = {Analysis of Focused Ion Beam Damages in Optoelectronic Devices Fabrication},
author = {Vallini, Felipe and Barea, Lu{'i}s A. and Reis, Elohim F. Dos and Zuben, Ant{^o}nio A. Von and Frateschi, Newton C.},
url = {http://ecst.ecsdl.org/content/39/1/299},
issn = {1938-6737, 1938-5862},
year  = {2011},
date = {2011-01-01},
urldate = {2014-05-14},
journal = {ECS Transactions},
volume = {39},
number = {1},
pages = {299--305},
abstract = {A study of the damages caused by gallium focused ion beam (FIB) is presented. Potential damages caused by local heating, ion implantation, and selective sputtering are presented. Preliminary analysis shows that local heating is negligible. Gallium implantation is shown to occur over areas tens of nanometers thick. Gallium accumulation as well as selective sputtering during III-V compound milling is expected. Particularly, for GaAs, this effect leads to gallium segregation and the formation of metallic clusters. Microdisks resonators are fabricated using FIB milling of different emission currents. It is shown that for higher emission current, thus higher implantation doses, the cavity quality factor rapidly decreases.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{wiederhecker_broadband_2011,
title = {Broadband tuning of optomechanical cavities},
author = {Wiederhecker, Gustavo S. and Manipatruni, Sasikanth and Lee, Sunwoo and Lipson, Michal},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-19-3-2782},
year  = {2011},
date = {2011-01-01},
urldate = {2014-05-14},
journal = {Optics Express},
volume = {19},
number = {3},
pages = {2782--2790},
abstract = {We demonstrate broadband tuning of an optomechanical microcavity optical resonance by exploring the large optomechanical coupling of a double-wheel microcavity and its uniquely low mechanical stiffness. Using a pump laser with only 13 mW at telecom wavelengths we show tuning of the silicon nitride microcavity resonances over 32 nm. This corresponds to a tuning power efficiency of only 400 mW/nm. By choosing a relatively low optical Q resonance (≈18,000) we prevent the cavity from reaching the regime of regenerative optomechanical oscillations. The static mechanical displacement induced by optical gradient forces is estimated to be as large as 60 nm.},
keywords = {devices, Micro-optical devices, Nonlinear optics},
pubstate = {published},
tppubtype = {article}
}
@conference{cardenas_efficient_2011,
title = {Efficient frequency conversion at low-powers in a silicon microresonator using carrier extraction},
author = {Cardenas, J. and Levy, J.S. and Wiederhecker, G. and Turner-Foster, A. and Gaeta, A.L. and Lipson, M.},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/Cardenas-et-al.-2011-Efficient-frequency-conversion-at-low-powers-in-a-.pdf},
year  = {2011},
date = {2011-01-01},
booktitle = {2011 Conference on Lasers and Electro-Optics (CLEO)},
pages = {1--2},
abstract = {We demonstrate four-wave mixing in a silicon microresonator at low powers using a PIN diode to extract the generated carriers. We achieve conversion efficiencies as high as -6.6 dB with 7 mW of input power.},
keywords = {carrier extraction, carrier generation, elemental semiconductors, four-wave mixing, frequency conversion, micro-optomechanical devices, micromechanical resonators, multiwave mixing, Nonlinear optics, optical frequency conversion, Optical pumping, Optical resonators, Optical ring resonators, optical waveguides, Optical wavelength conversion, p-i-n diodes, power 7 {mW}, Si, silicon, silicon microresonator, {PIN} diode, {PIN} photodiodes},
pubstate = {published},
tppubtype = {conference}
}
@conference{luo_engineering_2011,
title = {Engineering Optical Bistability in Silicon Ring Resonators},
author = {Luo, Lian-Wee and Wiederhecker, Gustavo and Preston, Kyle and Lipson, Michal},
url = {http://www.opticsinfobase.org/abstract.cfm?URI=CLEO_SI-2011-CWC4},
year  = {2011},
date = {2011-01-01},
urldate = {2014-05-14},
booktitle = {CLEO:2011 - Laser Applications to Photonic Applications},
pages = {CWC4},
publisher = {Optical Society of America},
series = {OSA Technical Digest (CD)},
abstract = {We demonstrate an atypical reverse optical bistability (blue shift of the resonance) in designed silicon ring resonators by compensating the thermo-optic red shift with a strong free carrier dispersion blue shift.},
keywords = {Bistability, Resonators},
pubstate = {published},
tppubtype = {conference}
}
@conference{alegre_full_2011,
title = {Full phononic bandgap in 2D-optomechanical crystals},
author = {Alegre, T.P.M. and Safavi-Naeini, A.H. and Winger, M. and Painter, O.},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/Alegre-et-al.-2011-Full-phononic-bandgap-in-2D-optomechanical-crystal.pdf},
year  = {2011},
date = {2011-01-01},
booktitle = {2011 Conference on Lasers and Electro-Optics (CLEO)},
pages = {1--2},
abstract = {We demonstrate simultaneous strong confinement and interaction of photons and phonons in a quasi two-dimensional (2D) slab.},
keywords = {2D-optomechanical crystals, Cavity resonators, Crystals, Optical device fabrication, Optical variables measurement, phononic bandgap, phononic crystals, photon-phonon interaction, photon-photon interactions, Photonic band gap, Photonics, strong confinement},
pubstate = {published},
tppubtype = {conference}
}
@article{luo_high_2011,
title = {High quality factor etchless silicon photonic ring resonators},
author = {Luo, Lian-Wee and Wiederhecker, Gustavo S. and Cardenas, Jaime and Poitras, Carl and Lipson, Michal},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-19-7-6284},
year  = {2011},
date = {2011-01-01},
urldate = {2014-05-14},
journal = {Optics Express},
volume = {19},
number = {7},
pages = {6284--6289},
abstract = {We demonstrate high quality factor etchless silicon photonic ring resonators fabricated by selective thermal oxidation of silicon without the silicon layer being exposed to any plasma etching throughout the fabrication process. We achieve a high intrinsic quality factor of 510,000 in 50 µm-radius ring resonators, corresponding to a ring loss of 0.8 dB/cm. The device has a total chip insertion loss of 2.5 dB, achieved by designing etchless silicon inverse nanotapers at both the input and output of the chip.},
keywords = {Resonators, Waveguides},
pubstate = {published},
tppubtype = {article}
}
@article{chan_laser_2011,
title = {Laser cooling of a nanomechanical oscillator into its quantum ground state},
author = {Chan, Jasper and Alegre, T. P. Mayer and Safavi-Naeini, Amir H. and Hill, Jeff T. and Krause, Alex and Gr{"o}blacher, Simon and Aspelmeyer, Markus and Painter, Oskar},
url = {http://www.nature.com/nature/journal/v478/n7367/full/nature10461.html},
issn = {0028-0836},
year  = {2011},
date = {2011-01-01},
urldate = {2014-05-14},
journal = {Nature},
volume = {478},
number = {7367},
pages = {89--92},
abstract = {The simple mechanical oscillator, canonically consisting of a coupled mass-spring system, is used in a wide variety of sensitive measurements, including the detection of weak forces and small masses. On the one hand, a classical oscillator has a well-defined amplitude of motion; a quantum oscillator, on the other hand, has a lowest-energy state, or ground state, with a finite-amplitude uncertainty corresponding to zero-point motion. On the macroscopic scale of our everyday experience, owing to interactions with its highly fluctuating thermal environment a mechanical oscillator is filled with many energy quanta and its quantum nature is all but hidden. Recently, in experiments performed at temperatures of a few hundredths of a kelvin, engineered nanomechanical resonators coupled to electrical circuits have been measured to be oscillating in their quantum ground state. These experiments, in addition to providing a glimpse into the underlying quantum behaviour of mesoscopic systems consisting of billions of atoms, represent the initial steps towards the use of mechanical devices as tools for quantum metrology or as a means of coupling hybrid quantum systems. Here we report the development of a coupled, nanoscale optical and mechanical resonator formed in a silicon microchip, in which radiation pressure from a laser is used to cool the mechanical motion down to its quantum ground state (reaching an average phonon occupancy number of nature10461-m1jpg1K8014). This cooling is realized at an environmental temperature of 20 K, roughly one thousand times larger than in previous experiments and paves the way for optical control of mesoscale mechanical oscillators in the quantum regime.},
keywords = {Applied physics and engineering, Physics},
pubstate = {published},
tppubtype = {article}
}
@conference{manipatruni_long-range_2011,
title = {Long-range synchronization of optomechanical structures},
author = {Manipatruni, Sasikanth and Weiderhecker, Gustavo and Lipson, Michal},
url = {http://www.opticsinfobase.org/abstract.cfm?uri=qels-2011-qwi1},
isbn = {978-1-55752-910-7},
year  = {2011},
date = {2011-01-01},
urldate = {2014-05-14},
pages = {QWI1},
publisher = {OSA},
abstract = {We theoretically and numerically demonstrate that long-range radiation force mediated 
mechanical coupling and synchronization arise in optomechanical systems. We propose a planar 
micro-optomechanical device that exhibits non-linear frequency and phase synchronization of two 
unlike mechanical resonators.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
@article{alegre_quasi-two-dimensional_2011,
title = {Quasi-two-dimensional optomechanical crystals with a complete phononicbandgap},
author = {Alegre, Thiago P. Mayer and Safavi-Naeini, Amir and Winger, Martin and Painter, Oskar},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-19-6-5658},
year  = {2011},
date = {2011-01-01},
urldate = {2014-05-14},
journal = {Optics Express},
volume = {19},
number = {6},
pages = {5658--5669},
abstract = {A fully planar two-dimensional optomechanical crystal formed in a silicon microchip is used to create a structure devoid of phonons in the GHz frequency range. A nanoscale photonic crystal cavity is placed inside the phononic bandgap crystal in order to probe the properties of the localized acoustic modes. By studying the trends in mechanical damping, mode density, and optomechanical coupling strength of the acoustic resonances over an array of structures with varying geometric properties, clear evidence of a complete phononic bandgap is shown.},
keywords = {Acousto-optical devices, Optomechanics, Photonic crystals},
pubstate = {published},
tppubtype = {article}
}
@conference{winger_tunable_2011,
title = {Tunable 2D photonic crystal cavities for cavity electro-optomechanics},
author = {Winger, M. and Alegre, T.P.M. and Safavi-Naeini, A.H. and Painter, O.},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/Winger-et-al.-2011-Tunable-2D-photonic-crystal-cavities-for-cavity-el.pdf},
year  = {2011},
date = {2011-01-01},
booktitle = {2011 Conference on Lasers and Electro-Optics (CLEO)},
pages = {1--2},
abstract = {We present and demonstrate a novel electro-opto-mechanical structure based on a slotted waveguide photonic-crystal cavity, in which electrostatics and optics couple simultaneously to the same "phonon" resonance.},
keywords = {cavity electro-optomechanics, cavity resonator filters, Cavity resonators, Modulation, nanophotonics, optical waveguides, Photonic crystals, Photonics, Probes, slotted waveguide photonic-crystal cavity, tunable 2D photonic crystal cavities, Tuning},
pubstate = {published},
tppubtype = {conference}
}
@article{perahia_electrostatically_2010,
title = {Electrostatically tunable optomechanical ``zipper'' cavity laser},
author = {Perahia, R. and Cohen, J. D. and Meenehan, S. and Alegre, T. P. Mayer and Painter, O.},
url = {http://scitation.aip.org/content/aip/journal/apl/97/19/10.1063/1.3515296},
issn = {0003-6951, 1077-3118},
year  = {2010},
date = {2010-01-01},
urldate = {2014-05-14},
journal = {Applied Physics Letters},
volume = {97},
number = {19},
pages = {191112},
abstract = {A tunable nanoscale ``zipper'' laser cavity, formed from two doubly clamped photonic crystal nanobeams, is demonstrated. Pulsed, room temperature, optically pumped lasing action at λ = 1.3 μ m is observed for cavities formed in a thin membrane containing InAsP/GaInAsP quantum-wells. Metal electrodes are deposited on the ends of the nanobeams to allow for microelectromechanical actuation. Electrostatic tuning over a range of Δ λ = 20 nm for an applied voltage amplitude of 9 V and modulation at a frequency as high as ν m = 6.7 MHz of the laser wavelength is demonstrated.},
keywords = {Bubble dynamics, Electrodes, Laser resonators, Optical resonators, Vibration resonance},
pubstate = {published},
tppubtype = {article}
}
@conference{safavi-naeini_efficient_2010,
title = {Efficient on-chip phonon-photon translation},
author = {Safavi-Naeini, A.H. and Mayer Alegre, T.P. and Painter, O.J.},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/Safavi-Naeini-et-al.-2010-Efficient-on-chip-phonon-photon-translation.pdf},
year  = {2010},
date = {2010-01-01},
booktitle = {2010 Conference on Lasers and Electro-Optics (CLEO) and Quantum Electronics and Laser Science Conference (QELS)},
pages = {1--2},
abstract = {We propose, analyze, design, and take the first experimental steps towards the demonstration of an on-chip device capable of converting photons to phonons, and vice versa, in a nearly quantum-limited setting.},
keywords = {integrated optics, Nonlinear optics, on-chip device, on-chip phonon-photon translation, Optical devices, Optical filters, Optical noise, Optical pumping, Optical scattering, Particle scattering, phonons, Photonic crystals, photons},
pubstate = {published},
tppubtype = {conference}
}
@article{perahia_electrostatically_2010b,
title = {Electrostatically tunable optomechanical ``zipper'' cavity laser},
author = {Perahia, R. and Cohen, J. D. and Meenehan, S. and Alegre, T. P. Mayer and Painter, O.},
url = {http://scitation.aip.org/content/aip/journal/apl/97/19/10.1063/1.3515296},
issn = {0003-6951, 1077-3118},
year  = {2010},
date = {2010-01-01},
urldate = {2014-05-14},
journal = {Applied Physics Letters},
volume = {97},
number = {19},
pages = {191112},
abstract = {A tunable nanoscale ``zipper'' laser cavity, formed from two doubly clamped photonic crystal nanobeams, is demonstrated. Pulsed, room temperature, optically pumped lasing action at λ = 1.3 μ m is observed for cavities formed in a thin membrane containing InAsP/GaInAsP quantum-wells. Metal electrodes are deposited on the ends of the nanobeams to allow for microelectromechanical actuation. Electrostatic tuning over a range of Δ λ = 20 nm for an applied voltage amplitude of 9 V and modulation at a frequency as high as ν m = 6.7 MHz of the laser wavelength is demonstrated.},
keywords = {Bubble dynamics, Electrodes, Laser resonators, Optical resonators, Vibration resonance},
pubstate = {published},
tppubtype = {article}
}
@article{mialichi_hybrid_2010,
title = {Hybrid planar microresonators with organic and InGaAs active media},
author = {Mialichi, J. R. and Camposeo, A. and Persano, L. and Barea, L. A. M. and Del Carro, P. and Pisignano, D. and Frateschi, N. C.},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-18-11-11650},
year  = {2010},
date = {2010-01-01},
urldate = {2014-05-14},
journal = {Optics Express},
volume = {18},
number = {11},
pages = {11650--11656},
abstract = {The authors report on the fabrication of hybrid planar micro-resonators based on InGaAs microdisks with an evaporated organic material. Samples of InGaAs grown on InP(100) substrates are obtained by Chemical Beam Epitaxy, and microdisks of InGaAs with different diameters are fabricated by focused ion beam. The hybrid disks are obtained by the subsequent evaporation of 8-hydroxyquinoline aluminium doped with 4-Dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran on the InGaAs microdisks. The devices, characterized by micro- and confocal photoluminescence imaging and spectroscopy, exhibit emission around 650 nm, from the organic material for disks with different radius. Finally, simultaneous emission in the visible and at whispering gallery resonant modes in the 1350-1450 nm range are observed due to excitation transfer to InGaAs. These devices open the possibility to combine the flexibility of organics with the high gain of III-V compounds for wavelength down conversion and telecom applications.},
keywords = {Integrated optics materials, Light-emitting polymers},
pubstate = {published},
tppubtype = {article}
}
@conference{valine_multi-segmented_2010,
title = {Multi-Segmented Semiconductor Optical Amplifier for Optical Saturation Control},
author = {Valine, Felipe and Zuben, Ant{^o}nio A. and Frateschi, Newton C.},
url = {http://www.opticsinfobase.org/abstract.cfm?URI=LAOP-2010-ThB2},
year  = {2010},
date = {2010-01-01},
urldate = {2014-05-14},
booktitle = {Latin America Optics and Photonics Conference},
pages = {ThB2},
publisher = {Optical Society of America},
series = {OSA Technical Digest (CD)},
abstract = {We fabricated multi-contacts tilted semiconductor amplifiers based on InGaAsP/InP quantum wells for external control of the optical power saturation. A linearity control of the amplification for DC signals was achieved for relatively low injection current},
keywords = {-wire and -dot devices, Optoelectronics, Quantum-well, Semiconductor optical amplifiers},
pubstate = {published},
tppubtype = {conference}
}
@article{safavi-naeini_optomechanics_2010,
title = {Optomechanics in an ultrahigh-Q two-dimensional photonic crystal cavity},
author = {Safavi-Naeini, Amir H. and Alegre, Thiago P. Mayer and Winger, Martin and Painter, Oskar},
url = {http://scitation.aip.org/content/aip/journal/apl/97/18/10.1063/1.3507288},
issn = {0003-6951, 1077-3118},
year  = {2010},
date = {2010-01-01},
urldate = {2014-05-14},
journal = {Applied Physics Letters},
volume = {97},
number = {18},
pages = {181106},
abstract = {We demonstrate an ultrahigh- Q slotted two-dimensional photonic crystalcavity capable of obtaining strong interaction between the internal light field and the mechanical motion of the slotted structure. The measured optical quality factor is Q = 1.2 × 10 6 for a cavity with an effective modal volume of V eff = 0.04 ( λ ) 3 . Optical transduction of the thermal motion of the fundamental in-plane mechanical resonance of the structure ( ν m = 151 MHz ) is performed, from which a zero-point motion optomechanical coupling rate of g ∗ / 2 π = 320 kHz is inferred. Dynamical back-action of the optical field on the mechanical motion, resulting in cooling and amplication of the mechanical motion, is also demonstrated.},
keywords = {Optical multistability, Optical resonators, Photonic crystal waveguides, Photonic crystals, Vibration resonance},
pubstate = {published},
tppubtype = {article}
}
@article{mialichi_resonance_2010,
title = {Resonance Modes in InAs/InGaAlAs/InP Quantum Dot Microdisk Resonators},
author = {Mialichi, Jose R. and Barea, Luis Alberto M. and Souza, Patricia L. De and Kawabata, Rudy Massami S. and Pires, Mauricio P. and Frateschi, Newton C.},
url = {http://ecst.ecsdl.org/content/31/1/289},
issn = {1938-6737, 1938-5862},
year  = {2010},
date = {2010-01-01},
urldate = {2014-05-14},
journal = {ECS Transactions},
volume = {31},
number = {1},
pages = {289--293},
abstract = {The authors report on the development of quantum dot microdisk resonators grown by metal-organic chemical vapor deposition. Two stacked layers of InAs quantum dots embedded in a lattice-matched InGaAlAs (λg=1.47 μm) are grown on (100) InP substrate. A new approach for the fabrication of active microdisk resonators is developed using focused-ion beam (FIB) followed by selective wet-chemical etching. Electrical and optical characterization of the resonator is presented. Emission in the C-band at whispering-gallery modes is observed.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
@article{mialichi_shorter_2010,
title = {Shorter wavelength emission with InAs quantum dots growth directly on large bandgap quaternary (In0.68Ga0.32As0.7P0.3) barriers for high current injection efficiency},
author = {Mialichi, J. R. and Frateschi, N. C.},
url = {http://www.sciencedirect.com/science/article/pii/S0022024810003003},
issn = {0022-0248},
year  = {2010},
date = {2010-01-01},
urldate = {2014-05-14},
journal = {Journal of Crystal Growth},
volume = {312},
number = {15},
pages = {2279--2283},
abstract = {We present the growth of stacked layers of InAs quantum dots directly on high bandgap In0.68Ga0.32As0.7P0.3 (λg=1420 nm) barriers. The quaternary material is lattice matched to InP forming a double hetero-structure. Indium flux, number of InAs stacked layers and InGaAsP inner separation layer thickness were investigated. Photoluminescence (PL) and atomic force microscopy (AFM) analysis indicate the occurrence of gallium diffusion and the arsenic/phosphorus (As/P) exchange with the InGaAsP barriers. As a result, shorter wavelength emission is observed, making the structures suitable for telecom applications.},
keywords = {A1. Atomic force microscopy, A1. Computer simulation, A1. Diffusion, A1. Nanostructures, A3. Chemical beam epitaxy, B2. Semiconducting {III}--V materials},
pubstate = {published},
tppubtype = {article}
}
@incollection{barea_si3n4/sio2_2010,
title = {Si3N4/SiO2 Planar Photonic Structures Fabricated by Focused Ion Beam},
author = {Barea, L. a. M. and Vallini, F. and Figueira, D. L. S. and Da Silva Filho, A. and Frateschi, N. C. and Vaz, A. R.},
editor = {Luryi, Serge and Xu, Jimmy and Zaslavsky, Alex},
url = {http://onlinelibrary.wiley.com/doi/10.1002/9780470649343.ch8/summary},
isbn = {9780470649343},
year  = {2010},
date = {2010-01-01},
urldate = {2014-05-14},
booktitle = {Future Trends in Microelectronics},
pages = {97--104},
publisher = {John Wiley & Sons, Inc.},
abstract = {This chapter contains sections titled: * Introduction * Fabrication and characterization * Conclusions},
keywords = {focused ion beam, four wave mixing, planar photonic structures, silicon, waveguide},
pubstate = {published},
tppubtype = {incollection}
}
@conference{perahia_towards_2010,
title = {Towards on-chip tunable nanolasers based on optomechanical zipper cavities},
author = {Perahia, R. and Alegre, T.P.M. and Cohen, J.D. and Painter, O.},
url = {https://sites.ifi.unicamp.br/lpd/files/2014/10/Perahia-et-al.-2010-Towards-on-chip-tunable-nanolasers-based-on-optome.pdf},
year  = {2010},
date = {2010-01-01},
booktitle = {2010 Conference on Lasers and Electro-Optics (CLEO) and Quantum Electronics and Laser Science Conference (QELS)},
pages = {1--2},
abstract = {Work towards semiconductor nanolasers at λ = 1.3 µm in optomechanically coupled one dimensional photonic-crystal cavities is presented. Optical mode spectroscopy and on-chip tuning capability based on capacitive actuation is developed. Experimental and theoretical results are presented.},
keywords = {Laser modes, Laser theory, Laser tuning, Optical pulses, Optical tuning, Physics, Q factor, Quantum dot lasers, Semiconductor lasers, Space vector pulse width modulation},
pubstate = {published},
tppubtype = {conference}
}