SKM 2021 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 8: Poster Session II
HL 8.1: Poster
Dienstag, 28. September 2021, 10:00–13:00, P
Design optimization for bright electrically-driven quantum dot single-photon sources emitting in telecom O-band — Sergey Blokhin1, Mikhail Bobrov1, Nikolai Maleev1, •Jan Donges2, Lukas Bremer2, Alexey Blokhin3, Alexey Vasil'ev3, Alexander Kuzmenkov3, Evgenii Kolodeznyi4, Vitaly Shchukin2, 5, Nikolay Ledentsov5, Stephan Reitzenstein2, and Victor Ustinov3 — 1Ioffe Institute, Politekhnicheskaya 26, St. Petersburg 194021, Russia — 2Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany — 3Research and Engineering Center for Submicron Heterostructures for Microelectronics, Politekhnicheskaya 26, St. Petersburg 194021, Russia — 4ITMO University, Kronverksky pr. 49, St. Petersburg 197101, Russia — 5VI Systems GmbH, Hardenbergstr. 7, 10623 Berlin, Germany
To enable long distance quantum communication, electrically-driven single-photon sources with almost ideal optical properties are desired. Through 3D finite-difference time-domain modelling, we present a design based on self-assembled quantum dots which delivers promising results in the telecom O-band by employing a broadband bottom distributed Bragg reflector (DBR) and a top DBR formed in a dielectric micropillar with an additional circular Bragg grating in the lateral plane. The design provides broadband emission enhancement (8-10nm) with an overall photon-extraction efficiency of 83% into the upper hemisphere, while photon coupling into single-mode fibers reaches efficiencies up to 40% for a HNA fiber (NA = 0.42). Blokhin et al., Opt. Express 29, 6582-6598 (2021)