The Nanophotonics Lab welcomes our newest group member, Felipe Santos (or Felipinho!). Felipe's research will be focused on investigating the quantum nature of opto-mechanical oscillators.
The Nanophotonics Lab welcomes our newest group member, Yovanny Espinel. Yovanny's PhD thesis will focus on optomechanical interaction in waveguides and micro cavities.
Power Insensitive Silicon Microring Resonators
Lian-Wee Luo, Gustavo S. Wiederhecker, Kyle Preston, and Michal Lipson
Opt. Lett. 37, 590-592 (2012) http://dx.doi.org/10.1364/OL.37.000590
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.
Synchronization of Micromechanical Oscillators Using Light
Mian Zhang, Gustavo Wiederhecker, Sasikanth Manipatruni, Arthur Barnard, Paul McEuen, and Michal Lipson
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 optical 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 towards reconfigurable massive synchronized oscillator networks.
A chip-scale integrated cavity-electro-optomechanics platform
M. Winger, T. D. Blasius, T. P. Mayer Alegre, A. H. Safavi-Naeini, S. Meenehan, J. Cohen, S. Stobbe, and O. Painter
Optics Express, 19, 24905-24921 (2011)
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.