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HL: Fachverband Halbleiterphysik

HL 7: Poster I

HL 7.53: Poster

Montag, 27. März 2023, 13:00–15:00, P2/EG

Fabrication of electrically controllable quantum dots in PIN diodes integrated within circular Bragg gratings — •Setthanat Wijitpatima¹, Normen Auler², Sven Rodt¹, Dirk Reuter², and Stephan Reitzenstein¹ — ¹Institute of Solid-State Physics, Technische Universität Berlin, D-10623 Berlin, Germany — ²Center of Optoelectronics and Photonics, Universität Paderborn, 33098 Paderborn, Germany

A quantum repeater is one emerging device of the decade that has been promised to play a crucial role in quantum communication. To produce an ideal quantum light source with high single-photon purity, nanophotonic structures must be fabricated on self-organized semiconductor quantum dots, which pose challenges due to their random occurrences and requirements of exact spatial and spectral integration. In addition to nanophotonic enhancement, such devices can be designed to allow an electrical manipulation of the excitonic state of quantum dots. Here, we propose a design that allows electrical controls via a PIN diode integrated within circular Bragg gratings (CBGs). Numerical simulations are done to optimize the design to yield the photon extraction efficiency (PEE) of 0.69 at N.A.=0.8. The deterministic fabrication is done with the use of cathodoluminescence (CL) scans and electron beam epitaxy (EBL), and the fabricated devices are characterized by electric-field dependent micro-photoluminescence (μPL) measurements.