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QI: Fachverband Quanteninformation

QI 24: Integrated Photonics II (joint session Q/QI)

QI 24.5: Vortrag

Mittwoch, 8. März 2023, 18:00–18:15, A320

Design of a satellite-based single photon source for quantum communication — •Najme Ahmadi for the QUICK3 collaboration — Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, 07745 Jena, Germany

Technologies of the so-called second quantum revolution have matured such they can now be used in space applications, e.g., long-distance quantum communication. Here we present the design of a compact true single photon source that can enhance the secure data rates in satellite-based quantum key distribution scenarios compared to conventional laser-based light sources. Our quantum light source is based on a fluorescent color center in hexagonal boron nitride. The emitter is off-resonantly excited by a diode laser and coupled to an integrated optics circuit that routes the photons to different experiments. These experiments either characterize the source directly by the second-order correlation function or test extended physical theories beyond the standard model. Our payload is currently being integrated into a 3U CubeSat and scheduled for launch in 2024 into the low Earth orbit. We can therefore evaluate the feasibility of true single photon sources in space and provide a promising route toward a high-speed quantum internet.