Next-generation single photon sources for satellite-based quantum communication

We 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.