SKM 2021 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 10: Materials and devices for quantum technology (joint session HL/TT)

TT 10.9: Talk

Wednesday, September 29, 2021, 12:30–12:45, H4

Single Photon Emission from a topological cavity — •Jonathan Jurkat¹, Sebastian Klembt¹, Tristan H. Harder¹, Johannes Beierlein¹, Monika Emmerling¹, Tobias Huber¹, Christian Schneider², and Sven Höfling¹ — ¹Technische Physik, Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany — ²Institute of Physics, University of Oldenburg, 26129 Oldenburg, Germany

We measured the emission enhancement as well as single photon emission of a In(Ga)As quantum in spectral resonance with a topological defect mode. The emission was measured in a micro-photoluminescence setup under quasi resonant pumping with a pulsed laser. Spectral resonance was achieved by means of temperature tuning. The photonics lattice and topologically protected defect mode was implemented in an orbital Su-Schrieffer-Heeger chain. This zigzag chain of coupled micropillar devices was fabricated using molecular beam epitaxy in combination with an etch and overgrowth technique. These coupled resonators offer the exciting opportunity to combine a complex band structure formation with the emission of single localized quantum emitters.