Category: Sem categoria

Artigo em destaque

Sorry, this entry is only available in Brazilian Portuguese. For the sake of viewer convenience, the content is shown below in the alternative language. You may click the link to switch the active language. Artigo de membros do grupo foi escolhido pelo SPBMat como artigo em destaque. Veja aqui o texto em português.

New article by group member

Strain-based band structure engineering is a powerful tool to tune the optical and electronic properties of semiconductor nanostructures. We show that we can tune the band structure of InGaAs semiconductor quantum wells and modify the helicity of the emitted light by integrating them into rolled-up heterostructures and changing their geometrical configuration. Experimental results from photoluminescence …

Continue reading

Presentation of PIBIC project – Pedro Carneiro

For the annual PIBIC congress, Pedro made a video poster of his work: “Desenvolvimento de um experimento de quantificação da concentração de elementos por fluorescência de raios X e aplicação para o estudo de modelos de epilepsia em roedores”.

Presentation of PIBIC project – Gabriel Gomes

For the annual PIBIC congress, Gabriel made a video poster of his work “Fabricação e caracterização de membranas baseadas em nanoestruturas semicondutoras”.

New article by group member: Band structure engineering in strain-free GaAs mesoscopic structures

We investigate the optical properties of strain-free mesoscopic GaAs/Al(x)Ga(1-x)As structures (MGS) coupled to thin GaAs/A(x)Ga(1-x)As quantum wells (QWs) with varying Al content (x). We demonstrate that quenching the QW emission by controlling the band crossover between AlGaAs X-point and GaAs Gamma-point gives rise to long carrier lifetimes and enhanced optical emission from the MGS. For …

Continue reading