SKM 2023 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 33: Poster II
HL 33.50: Poster
Wednesday, March 29, 2023, 17:00–19:00, P1
In-plane coupling between a WGM micropillar laser and a ridge waveguide — •Léo Roche1, Imad Limame1, Ching-Wen Shih1, Aris Koulas-Simos1, Yuhui Yang1, Sven Burger2, and Stephan Reitzenstein1 — 1Institut für Festkörperphysik (TUB), Berlin, Germany — 2JCMwave GmbH, Berlin, Germany
Integrated quantum photonic circuits (IQPCs) are very promising can- didates 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 reso- nant excitation of an integrated QD in a waveguide by means of an on-chip integrated coherent light microlaser. Towards this goal, we in- vestigate 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 predict the pillar dimensions allowing for lasing modes in the typical emission wavelength of InGaAs QD (930nm) and investigate the coupling efficiency and the Q-factor of the pillar-waveguide system for different angular mode number, pillar- waveguide air gap distances and interface types (point-like or pulley coupling). The III-V semiconductor type nanostructures composed of a GaAs cavity with InGaAs QDs and distributed Bragg reflectors are processed using high-resolution electron beam lithography. Simulation predictions and micro-photoluminescence spectroscopy performed on the nanoprocessed devices are compared and discussed.