We give a short insight into our work on single photon emitters hosted in hexagonal Boron Nitride (hBN) and photonic integrated circuits, together with technology demonstrations of this platform. We have recently shown the deterministic creation of near-ideal hBN single photon emitters at room temperature and have made important progress on the identification of their atomic origin, comparing their optical characteristics with density functional theory calculations. The quantum emitters can be employed in various applications, including tests on the fundamentals of quantum mechanics and quantum communication, for which we work on their integration into photonic integrated circuits based on laser-written waveguides.
We present a compact room temperature single photon source based on a color center in hexagonal boron nitride for future long-distance satellite-based quantum networks. The performance of this quantum light source is sufficient to outperform state-of-the-art laser-based decoy quantum key distribution protocols. The emitter is directly coupled to a photonic integrated circuit that routes the single photons to different experiments. This includes both a verification of the single photon source via measuring the photon statistics, as well as a fundamental test extended quantum theory in microgravity. The payload is currently being integrated on a 3U CubeSat and will be launched in 2024 as part of the QUICK3 mission.
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