Bright single-photon emission from a GeV center in diamond under a microfabricated solid immersion lens at room temperature
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-05-16 |
| Journal | Journal of Applied Physics |
| Authors | Justus Christinck, F. Hirt, Helmut Hofer, Zhe Liu, Markus Etzkorn |
| Institutions | Technische UniversitƤt Braunschweig, University of Turin |
| Citations | 10 |
Abstract
Section titled āAbstractāWe report on the metrological characterization of the emission from a germanium-vacancy center in diamond under a microfabricated solid immersion lens in a confocal laser-scanning microscope setup. Ge ions were implanted into a synthetic diamond at 3 MeV, and germanium-vacancy centers were then formed by subsequent annealing. Afterward, solid immersion lenses were fabricated in a focused ion beam scanning electron microscope. The photoluminescence was investigated at room temperature in terms of the spectral distribution, the excited state lifetime, the second-order correlation function, and the saturation behavior, proving simultaneous high single-photon purity and high brightness. Two methods were exploited to minimize the residual multi-photon probability: spectral filtering and temporal filtering. According to these results, we assume that Raman scattered photons and emission from neighboring color centers play an important role in the residual multi-photon emission probability. The system efficiency of the single-photon source was investigated and found to be in accordance with the value calculated from all sources of loss in the setup. The branching ratio of the germanium-vacancy center for the decay into the ground state and into metastable state was calculated. The results enable the usage of the single-photon source in future quantum radiometric experiments.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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