{
  "id": "2301.10383",
  "version": "v1",
  "published": "2023-01-25T02:17:16.000Z",
  "updated": "2023-01-25T02:17:16.000Z",
  "title": "Spectroscopy of photoionization from the $^1E$ singlet state in nitrogen$-$vacancy centers in diamond",
  "authors": [
    "Sean M. Blakley",
    "Thuc T. Mai",
    "Stephen J. Moxim",
    "Jason T. Ryan",
    "Adam J. Biacchi",
    "Angela R. Hight Walker",
    "Robert D. McMichael"
  ],
  "comment": "10 pages, 7 figures. Submission to Physical Review X",
  "categories": [
    "quant-ph",
    "cond-mat.mtrl-sci",
    "physics.app-ph",
    "physics.comp-ph",
    "physics.optics"
  ],
  "abstract": "The $^1E-^1A_1$ singlet manifold of the negatively charged nitrogen vacancy $(NV^-)$ center in diamond plays a central role in the quantum information and quantum sensing applications of the $NV^-$ center. However, the energy of this manifold within the diamond bandgap and with respect to the $^3A_2-^3E$ triplet manifold has not been measured directly. Using field-quenching effects on photoluminescence (PL) spectra, we report on the energy gap between the $^1E-^1A_1$ singlet manifold and the $^3A_2$ and $^3E$ ground and excited triplet states of the $NV^-$ as a function of excitation wavelength and power, temperature, and applied magnetic field in a heavily nitrogen-doped sample. Increased PL and decreased zero-phonon line width from the $NV^0$ were observed in the presence of an applied magnetic field, indicating ionization from the long-lived $^1E$ singlet state. A temperature-dependent ionization threshold between 532 nm and 550 nm was found, locating the singlet states within the diamond band gap.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-01-25T02:17:16.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "singlet state",
      "vacancy centers",
      "applied magnetic field",
      "singlet manifold",
      "spectroscopy"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}