Vogl, TobiasTobiasVoglRitter, S.S.RitterAbasifard, M.M.AbasifardKrause, J.J.KrauseKnopf, H.H.KnopfEilenberger, F.F.Eilenberger2022-10-122022-10-122022https://publica.fraunhofer.de/handle/publica/42758710.1117/12.26168592-s2.0-85135755057We present a room temperature single photon source based on a color center hosted by the two-dimensional material hexagonal boron nitride for satellite-based quantum networks. The resonator-coupled emitter is characterized by a narrowband and tuneable spectrum, high photon purity, as well as a high quantum efficiency. Our space qualification on the individual component level has demonstrated resistance to shock and vibration that are expected during a typical rocket launch, tolerance to the radiation environment in space, as well as insensitivity to thermal and vacuum cycling. We are now integrating the photon source and a single photon detection system on a 3U CubeSat to verify its functionality in orbit for future use in a global satellite-based quantum-encrypted network. Moreover, the satellite is also equipped with a multi-path interferometer that allows us to test extended quantum theories in microgravity.en2D MaterialsFluorescent DefectsQuantum GravityQuantum Key DistributionSatellite-based Quantum NetworksSingle Photonsconference paper