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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2010.15475 |
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| _version_ | 1866911922531598336 |
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| author | Nahra, Mackrine Alshamaa, Daniel Deturche, Regis Davydov, Valery Kulikova, Ludmila Agafonov, Viatcheslav Couteau, Christophe |
| author_facet | Nahra, Mackrine Alshamaa, Daniel Deturche, Regis Davydov, Valery Kulikova, Ludmila Agafonov, Viatcheslav Couteau, Christophe |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2010_15475 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | Single germanium vacancy centres in nanodiamonds with bulk-like spectral stability Nahra, Mackrine Alshamaa, Daniel Deturche, Regis Davydov, Valery Kulikova, Ludmila Agafonov, Viatcheslav Couteau, Christophe Quantum Physics 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. |
| title | Single germanium vacancy centres in nanodiamonds with bulk-like spectral stability |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2010.15475 |