High Resolution Temperature-Resolved Spectroscopy of the Nitrogen Vacancy $^{1}E$ Singlet State Ionization Energy
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| Format: | Preprint |
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2025
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| _version_ | 1866908448939048960 |
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| author | Ung, Kristine V. Roncaioli, Connor A. Walsworth, Ronald L. Blakley, Sean M. |
| author_facet | Ung, Kristine V. Roncaioli, Connor A. Walsworth, Ronald L. Blakley, Sean M. |
| contents | The negatively charged diamond nitrogen-vacancy ($\mathrm{{NV}^-}$) center plays a central role in many cutting edge quantum sensing applications; despite this, much is still unknown about the energy levels in this system. The ionization energy of the $\mathrm{^{1}E}$ singlet state in the $\mathrm{{NV}^-}$ has only recently been measured at between 2.25 eV and 2.33 eV. In this work, we further refine this energy by measuring the $\mathrm{^{1}E}$ energy as a function of laser wavelength and diamond temperature via magnetically mediated spin-selective photoluminescence (PL) quenching; this PL quenching indicating at what wavelength ionization induces population transfer from the $\mathrm{^{1}E}$ into the neutral $\mathrm{{NV}^0}$ charge configuration. Measurements are performed for excitation wavelengths between 450 nm and 470 nm and between 540 nm and 566 nm in increments of 2 nm, and for temperatures ranging from about 50 K to 150 K in 5 K increments. We determine the $\mathrm{^{1}E}$ ionization energy to be between 2.29 and 2.33 eV, which provides about a two-fold reduction in uncertainty of this quantity. Distribution level: A. Approved for public release; distribution unlimited. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_10291 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | High Resolution Temperature-Resolved Spectroscopy of the Nitrogen Vacancy $^{1}E$ Singlet State Ionization Energy Ung, Kristine V. Roncaioli, Connor A. Walsworth, Ronald L. Blakley, Sean M. Materials Science Optics Quantum Physics The negatively charged diamond nitrogen-vacancy ($\mathrm{{NV}^-}$) center plays a central role in many cutting edge quantum sensing applications; despite this, much is still unknown about the energy levels in this system. The ionization energy of the $\mathrm{^{1}E}$ singlet state in the $\mathrm{{NV}^-}$ has only recently been measured at between 2.25 eV and 2.33 eV. In this work, we further refine this energy by measuring the $\mathrm{^{1}E}$ energy as a function of laser wavelength and diamond temperature via magnetically mediated spin-selective photoluminescence (PL) quenching; this PL quenching indicating at what wavelength ionization induces population transfer from the $\mathrm{^{1}E}$ into the neutral $\mathrm{{NV}^0}$ charge configuration. Measurements are performed for excitation wavelengths between 450 nm and 470 nm and between 540 nm and 566 nm in increments of 2 nm, and for temperatures ranging from about 50 K to 150 K in 5 K increments. We determine the $\mathrm{^{1}E}$ ionization energy to be between 2.29 and 2.33 eV, which provides about a two-fold reduction in uncertainty of this quantity. Distribution level: A. Approved for public release; distribution unlimited. |
| title | High Resolution Temperature-Resolved Spectroscopy of the Nitrogen Vacancy $^{1}E$ Singlet State Ionization Energy |
| topic | Materials Science Optics Quantum Physics |
| url | https://arxiv.org/abs/2507.10291 |