Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 46: Nano-Optics (Single Quantum Emitters) II
Q 46.8: Talk
Thursday, March 12, 2020, 15:45–16:00, a310
Next-generation single-photon sources for satellite-based quantum communication — •Tobias Vogl1,2, Ruvi Lecamwasam3, Ben Buchler3, Yuerui Lu3, Ping Koy Lam3, and Falk Eilenberger1 — 1Friedrich-Schiller-Universität — 2University of Cambridge — 3Australian National University
Color centers in solid state crystals have become a frequently used system for single-photon generation, advancing the development of integrated photonic devices for quantum optics and quantum communication applications. Recently, defects hosted by two-dimensional (2D) hexagonal boron nitride (hBN) attracted the attention of many researchers, due to its chemical and thermal robustness as well as high single-photon luminosity at room temperature. Here, we present recentadvances in engineering this new type of emitter. The quantum emitter is coupled with a nanophotonic cavity, improving its performance so that the single-photon source is feasible for practical quantum information processing protocols. The cavity-coupled device is characterized by an increased collection efficiency and quantum yield, combined with off-resonant noise suppression and improvement of photophysics. Moreover, the complete source, including all control units and driving electronics is implemented on a 1U CubeSat platform. An application of particular interest is satellite-based single-photon quantum key distribution. Simulations predict the performance of the source is sufficient to outperform conventional decoy state protocols. We will also show results on the first ever quantum information experiment involving single-photons from hBN.