Fabrication of cylindrical resonant microcavities using the confinement provided by partially oxidized AlGaAs/GaAs layers

Autor(es)

Palomino, Gustavo A. M. ; Pinho, Pedro V. N. ; Garcia, Ailton J., Jr. ; Deneke, Christoph F. ; Frateschi, Newton C. ; IEEE

• Tipo de documento: Artigo Científico
• Fonte: 2019 SBFOTON INTERNATIONAL OPTICS AND PHOTONICS CONFERENCE (SBFOTON IOPC); v. N/A, p. 5-pg., 2019-01-01.

Resumo

Two different interfaces for optical confinement in GaAs resonators (air/GaAs/air, air/GaAs/AlOx) are compared in cylindrical microstructures with 10 mu m of diameter. The AlOx is obtained by the lateral oxidation of Al0.9Ga0.1As layers. The spectrum of the resonators is obtained using a tapered fiber system in the wavelength range between 1470 nm and 1610 nm. The modal separation agrees with simulations. The quality factor for the cylindrical microstructures having air/GaAs/air interface is almost twice the value for the case of AlOx interface. Since it is expected that surface recombination velocity is reduced by a factor of ten for this last case, these structures are expected to be suitable for the development of active resonators. (AU)

• Processo FAPESP: 15/24517-8 - Fotônica para internet de nova geração
• Beneficiário: Hugo Enrique Hernández Figueroa
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/09481-2 - Microcavidades ressonantes de microdiscos utilizando o confinamento provido por GaAs e AlxGa1-xAs parcialmente oxidado
• Beneficiário: Pedro Vinicius Pinho Nascimento
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica