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A germanium-vacancy center in diamond as single-photon source for radiometric application

MetadataDetails
Publication Date2024-10-01
JournalJournal of Physics Conference Series
AuthorsJustus Christinck, F. Hirt, Helmut Hofer, Hristina Georgieva, Zhe Liu

Abstract We present the metrological characterization of a single-photon source based on a germanium-vacancy center in diamond under a solid immersion lens in a confocal microscope setup at room temperature. It was characterized in terms of the emission’s spectral distribution, single-photon purity, temporal stability and the emitter’s excited state lifetime and saturation behavior. An Allan deviation analysis was performed on the emission of the single-photon source to determine the optimal averaging time of the photon flux. The single-photon source was used for the relative calibration of the detection efficiency of two single-photon avalanche diode detectors. The results were compared with measurements using attenuated laser light for the calibration of the detectors.

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