Phonon-assisted charge-cycling of nitrogen-vacancy centres in diamond
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866914545004445696 |
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| author | Olney-Fraser, M. Fuhrmann, J. Dietel, S. Kazak, L. Jelezko, F. |
| author_facet | Olney-Fraser, M. Fuhrmann, J. Dietel, S. Kazak, L. Jelezko, F. |
| contents | The nitrogen-vacancy (NV) centre in diamond is a leading platform for room-temperature quantum sensing. Improvements in sensitivity require precise control of the NV charge state. Transitions from the neutral NV$^0$ charge state to the negative NV$^-$ charge state can occur during excitation with photon energies below the ZPL transition of NV$^0$. These sub-resonant charge transitions limit modern initialisation protocols and have not been studied in full detail. In this paper we show that sub-resonant charge cycling arises from phonon-assisted anti-Stokes excitation. We further uncover the phonon states which contribute most strongly to the anti-Stokes transition via the development of novel quantitative models. The models indicate that low energy acoustic phonons strongly contribute to the transition close to the ZPL. At longer wavelengths a 43\,meV mode additionally impacts the charge cycling dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_07891 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Phonon-assisted charge-cycling of nitrogen-vacancy centres in diamond Olney-Fraser, M. Fuhrmann, J. Dietel, S. Kazak, L. Jelezko, F. Quantum Physics The nitrogen-vacancy (NV) centre in diamond is a leading platform for room-temperature quantum sensing. Improvements in sensitivity require precise control of the NV charge state. Transitions from the neutral NV$^0$ charge state to the negative NV$^-$ charge state can occur during excitation with photon energies below the ZPL transition of NV$^0$. These sub-resonant charge transitions limit modern initialisation protocols and have not been studied in full detail. In this paper we show that sub-resonant charge cycling arises from phonon-assisted anti-Stokes excitation. We further uncover the phonon states which contribute most strongly to the anti-Stokes transition via the development of novel quantitative models. The models indicate that low energy acoustic phonons strongly contribute to the transition close to the ZPL. At longer wavelengths a 43\,meV mode additionally impacts the charge cycling dynamics. |
| title | Phonon-assisted charge-cycling of nitrogen-vacancy centres in diamond |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2605.07891 |