Single germanium vacancy centres in nanodiamonds with bulk-like spectral stability
| Autor: | Nahra, Mackrine, Alshamaa, Daniel, Deturche, Regis, Davydov, Valery, Kulikova, Ludmila, Agafonov, Viatcheslav, Couteau, Christophe |
|---|---|
| Rok vydání: | 2020 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1116/5.0035937 |
| Popis: | Motivated by the success of group IV colour centres in nanodiamonds (NDs) for hybrid technology requiring a single photon source, we study single germanium-vacancy (GeV$^-$) centres in NDs at room temperature with size rangingfrom 10 to 50 nm and with remarkable spectral properties. We characterize their zero-phonon line (ZPL), study their internal population dynamics and compare their emission properties in the framework of a three level model with intensity dependent de-shelving. Furthermore, we characterize their lifetime, polarization and brightness. We find amaximum photon emission count rate of 1.6 MHz at saturation. We also report a polarization visibility of 92% from the fluorescence light, which potentially makes GeV$^-$ centres good candidates for quantum key distribution (QKD)requiring polarized single photons. We show that the GeV$^-$ in NDs presented in this work have a comparable spectral stability compared to their bulk counterpart which is needed for future applications using NDs. Comment: 7 pages, 5 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|