Agradecimentos: We would like to acknowledge financial support from FAPESP under Grant (2017/09481-2), FAPESP under the contract 2015/24517-8 and CNPq: 305907/2018-2. We would like also to thank Antonio Von Zuben for all the help in fabricating the resonators and Rodrigo Benevides for the help with...

Agradecimentos: We would like to acknowledge financial support from FAPESP under Grant (2017/09481-2), FAPESP under the contract 2015/24517-8 and CNPq: 305907/2018-2. We would like also to thank Antonio Von Zuben for all the help in fabricating the resonators and Rodrigo Benevides for the help with the tapered fiber measurement. We acknowledge the acess to the clean room facilities of CCS Nano

Abstract: Two different interfaces for optical confinement in GaAs resonators (air/GaAs/air, air/GaAs/AlOx) are compared in cylindrical microstructures with 10 µm of diameter. The AlOx is obtained by the lateral oxidation of Al0.9Ga0.1As layers. The spectrum of the resonators is obtained using a...

Abstract: Two different interfaces for optical confinement in GaAs resonators (air/GaAs/air, air/GaAs/AlOx) are compared in cylindrical microstructures with 10 µm 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

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2017/09481-2; 2015/24517-8

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

305907/2018-2

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