[21a-A101-1~11] 3.10 Photonic structures and phenomena (formerly 3.11)

[21a-A101-10] Optical Absorption Enhancement of a GaAs Quantum Well Embedded in an Air-bridge Bull’s-eye Optical Cavity

〇Sangmin Ji¹, Takeyoshi Tajiri², Xiao-Fei Liu³, Haruki Kiyama^3,4, Akira Oiwa³, Julian Ritzmann⁵, Arne Ludwig⁵, Andreas Dirk Wieck⁵, Satoshi Iwamoto¹ (1.Univ. Tokyo, 2.Univ. Elec. Comm., 3.Osaka Univ., 4.Kyushu Univ., 5.Ruhr-Univ. Bochum)

Keywords:quantum communication, photonic nanostructures, optical nanocavities

We have been investigating the possibility of using a bull's-eye structure containing GaAs quantum wells (QWs) as an optical cavity that significantly increases the photon absorption efficiency of gate-controlled quantum dots formed in the QWs without polarization dependence. In this report, we report photoluminescence excitation measurements on the fabricated resonator, which demonstrate an almost polarization-independent enhancement of QW absorption.