Regensburg 2022 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 25: Poster 1
HL 25.76: Poster
Wednesday, September 7, 2022, 18:00–20:00, P2
Experimental and numerical investigation of the evanescent coupling between an integrated micropillar laser and a ridge waveguide — •Léo Roche1, Imad Limame1, Ching-Wen Shih1, Yuhui Yang1, Shulun Li1, 2, and Stephan Reitzenstein1 — 1Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany — 2State Key Laboratory for Superlattice and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
Integrated Quantum Photonic Circuits (IQPCs) are very promising candidates for scalable and flexible on-chip quantum computation and quantum communication hardware. One critical requirement for their realization is the scalable integration of on-demand indistinguishable single-photon emitters. This is potentially possible through the resonant excitation of an integrated QD in a waveguide by means of an on-chip integrated coherent light microlaser. Towards this goal, we investigate the coupling and lasing properties of coherent light laterally emitted from a whispering gallery mode (WGM) type micropillar laser evanescently coupled to a single mode ridge waveguide. Using finite element method (FEM) simulations, we investigate the coupling efficiency and the Q-factor of the pillar-waveguide system for different angular mode number and various pillar-waveguide air gap distances. The III-V semiconductor type nanostructures composed of a GaAs cavity with InAs QDs and distributed Bragg reflectors are carefully processed using electron beam lithography and then measured using micro-photoluminescence spectroscopy.