SKM 2021 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 20: Quantum Dots and Wires (joint session HL/TT)

TT 20.1: Invited Talk

Thursday, September 30, 2021, 13:30–14:00, H4

Telecom wavelength quantum dot-based single-photon sources for quantum technologies — •Anna Musial — Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland

Important building blocks for quantum technology applications are non-classical light sources, in particular those emitting single photons on demand. Among pursued approaches to realize them semiconductor epitaxial quantum dots (QDs) stand out in terms of single-photon purity, compatibility with semiconductor technology including deterministic fabrication of photonic structures, integration into photonic circuits and fiber infrastructure as well as unprecedented possibilities of engineering their electronic structure and optical properties. The current status, recent developments and future prospects of the single-photon sources based on single GaAs-based and InP-based epitaxial QDs emitting in the telecommunication spectral range will be given. Reviewed aspects include thermal stability of emission, energies for efficient quasi-resonant excitation, optimization of photon extraction efficiency, approaches to maximize coupling to a single mode telecom fiber, single-photon emission purity as well as tests of a fully operational plug&play fiber-based single-photon source.