Freiburg 2019 – scientific programme
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FM: Fall Meeting
FM 32: Enabling Technologies: Sources of Quantum States of Light II
FM 32.1: Invited Talk
Tuesday, September 24, 2019, 14:00–14:30, 1010
Next-generation single-photon sources for satellite-based quantum communication — •Tobias Vogl1,2, Ruvi Lecamwasam1, Ben C. Buchler1, Yuerui Lu1, Ping K. Lam1, and Falk Eilenberger2 — 1The Australian National University, Canberra, Australia — 2Friedrich-Schiller-Universität, Jena, Germany
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 recent advances 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, the most efficient state-of-the-art protocols for quantum cryptography.