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THU: Thursday Contributed Sessions
THU 13: Poster Session: Applications
THU 13.31: Poster
Thursday, September 11, 2025, 16:30–18:30, ZHG Foyer 1. OG
Deterministic generation of highly indistinguishable single photons in the telecom C-band — •Nico Hauser1, Matthias Bayerbach1, Jochen Kaupp2, Yorick Reum2, Giora Peniakov2, Johannes Michl2, Martin Kamp2, Tobias Huber-Loyola2, Andreas T. Pfenning2, Sven Höfling2, and Stefanie Barz1 — 1Universität Stuttgart, Institut für funktionelle Materie und Quantentechnologien — 2Julius-Maximilians-Universität Würzburg, Physikalisches Institut, Lehrstuhl für Technische Physik
The deterministic generation of highly indistinguishable single photons in the telecom C-band is a critical requirement for many quantum communication and distributed quantum computation protocols. While quantum dot-based single-photon sources have demonstrated excellent performance in the 780 nm to 960 nm range, extending this performance to the telecom C-band remains an active area of research. Here, we present a single-photon source operating in the telecom C-band based on an InAs quantum dot in a circular bragg grating resonator, achieving raw two-photon interference visibilities exceeding 90%. We explore different optical excitation schemes to optimize the performance of the source in terms of multi-photon emission probability and two-photon interference visibility.
Keywords: Quantum Dots; Single Photons; Telecom Photons; Quantum Information