Regensburg 2022 – scientific programme

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SYPQ: High Yield Devices for Photonic Quantum Implementations

SYPQ 1: High Yield Devices for Photonic Quantum Implementations

SYPQ 1.4: Invited Talk

Tuesday, September 6, 2022, 11:15–11:45, H1

Quantum-dot single-photon sources for quantum photonic networks — •Peter Michler — University of Stuttgart, Institute for semiconductor optics and functional interfaces, Stuttgart, Germany

In many foreseen implementations of quantum photonic networks, photons must be able to propagate over long distances in silica fibers with limited absorption and wave packet dispersion. When propagating into silica fibers, photons in the so-called telecom C-band (1530-1565 nm) will experience the absolute minimum of absorption whereas in the O-band (1260-1360 nm) they can travel with vanishing dispersion together with limited absorption.

In this talk, we report about recent highlights achieved with quantum dots emitting in the telecom O- and C-band [1,2]. This includes bright Purcell enhanced single-photon sources based on quantum dots in circular Bragg gratings [2] and the study of resonance fluorescence of single In(Ga)As QDs emitting in the telecom C-band [3]. Moreover, we present an efficient and stable fiber-to-chip coupling, which enables the injection of single photons from telecom quantum dots into a silicon-on-insulator chip [4].

[1] S. L. Portalupi, M. Jetter and P. Michler, Semicond. Sci. Technol. 34, 053001 (2019) [2] S. Kolatschek et al., Nano Lett. 21, 7740 (2021) [3] C. Nawrath et al., Appl. Phys. Lett. 118, 244002 (2021) [4] S. Bauer et al., Appl. Phys. Lett. 119, 211101 (2021)