Freiburg 2024 – wissenschaftliches Programm
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SYQO: Symposium Ultrafast Quantum Nano-Optics
SYQO 1: Ultrafast Quantum Nano-Optics
SYQO 1.4: Vortrag
Freitag, 15. März 2024, 12:30–12:45, Paulussaal
Compact chirped fiber Bragg gratings for single-photon generation from quantum dots — •Vikas Remesh1, Ria Krämer2, René Schwarz1, Florian Kappe1, Yusuf Karli1, Thomas Bracht3, Saimon Covre da Silva4, Armando Rastelli4, Doris Reiter3, Stefan Nolte2, and Gregor Weihs1 — 1Institute für Experimentalphysik, Universität Innsbruck, Innsbruck, Austria — 2Institute for Applied Physics, Friedrich Schiller University Jena, Germany — 3Condensed Matter Theory, TU Dortmund, Germany — 4Johannes Kepler University Linz, Linz, Austria
To realize a scalable source of frequency-multiplexed single photons, one requires an ensemble of quantum emitters that can be collectively excited with high efficiency. Semiconductor quantum dots hold great potential here. The most efficient scheme is to use chirped laser pulses, due to the robustness against spectral and intensity fluctuations. Yet, the existing methods to generate chirped laser pulses coupled to a quantum emitter are lossy and mechanically unstable, severely hampering the prospects of a practical quantum dot device. Here we present a compact, robust, and plug-and-play alternative for chirped pulse excitation of quantum dots, based on chirped fiber Bragg gratings, and demonstrate the chirped excitation of a GaAs/AlGaAs quantum dot. Our method can be tailored for large dispersion requirements and is a significant milestone in realizing a direct fiber-coupled quantum dot photon source. APL Photonics 8, 101301 (2023)
Keywords: quantum dots; chirped pulses; single photons; chirped fiber Bragg gratings