Berlin 2024 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 25: Materials and Devices for Quantum Technology II (joint session HL/QI)

QI 25.7: Vortrag

Donnerstag, 21. März 2024, 16:00–16:15, EW 203

Plug-and-play quantum light from semiconductor quantum dots in fiber-pigtailed hybrid circular Bragg Gratings — •Lucas Rickert¹, Kinga Zolnacz², Daniel Vajner¹, Martin v. Helversen¹, Johannes Schall¹, Shulun Li^1,4, Sven Rodt¹, Anna Musial³, Grzegorz Sek³, Zhichuan Niu⁴, Stephan Reitzenstein¹, and Tobias Heindel¹ — ¹Institute of Solid State Physics, Technical University Berlin, Berlin, Germany — ²Department of Optics and Photonics, Wroclaw University of Science and Technology, Wroclaw, Poland — ³Department of Experimental Physics, Wroclaw University of Science and Technology, Wroclaw, Poland — ⁴Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China

We report on the fabrication of hybrid circular Bragg gratings (hCBGs) with deterministically integrated semiconductor quantum dots (QDs), and discuss in detail the fabrication methods to deterministically match the emitter spatially and spectrally to the cavity mode. The devices exhibit bright, pure and indistinguishable single photon emission with experimentally measured Purcell enhancement >15 with high reproducibility.

Finally, we show how these high-performance hCBGs can be combined with directly attached single-mode fibers to harness the high quality quantum light in a plug-and-play fashion, and discuss excitation schemes suitable for optimum performance of these fiber-coupled systems.

Keywords: semiconductor quantum dots; hybrid circular bragg gratings; fiber-coupling; quantum light source; plug-and-play