SKM 2023 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 24: Quantum dots: Optics

HL 24.13: Talk

Wednesday, March 29, 2023, 13:00–13:15, POT 151

Single photon source in a topological cavity — Jonathan Jurkat¹, Sebastian Klembt¹, Marco De Gregorio¹, •Moritz Meinecke¹, Quirin Buchinger¹, Tristan Hader¹, Johannes Beierlein¹, Oleg Egorov³, Monika Emmerling¹, Constantin Krause¹, Christian Schneider², Tobias Huber-Loyola¹, and Sven Höfling¹ — ¹Technische Physik, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, 97074 Würzburg, Germany — ²Lehrstuhl für Physik, Universität Oldenburg, 26129 Oldenburg, Germany — ³Lehrstuhl für Kondensierte Materietheorie und Optik, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany

The introduction of topological physics into the field of photonics has led to the development of photonic devices endowed with robustness against structural and photonic disorder. While a range of platforms have been successfully implemented demonstrating topological protection of light in the classical domain, the implementation of quantum light sources in photonic devices harnessing topologically non-trivial resonances is largely unexplored. Here, we demonstrate a single photon source based on a single semiconductor quantum dot coupled to a topologically non-trivial Su-Schrieffer-Heeger (SSH) cavity mode. We provide an in-depth study of Purcell enhancement for this topological quantum light source and demonstrate its emission of non-classical light on demand. Our approach is a promising step towards the application of topological cavities in quantum photonics.