{
  "id": "2403.04611",
  "version": "v1",
  "published": "2024-03-07T15:57:57.000Z",
  "updated": "2024-03-07T15:57:57.000Z",
  "title": "Cavity-assisted resonance fluorescence from a nitrogen-vacancy center in diamond",
  "authors": [
    "Viktoria Yurgens",
    "Yannik Fontana",
    "Andrea Corazza",
    "Brendan J. Shields",
    "Patrick Maletinsky",
    "Richard J. Warburton"
  ],
  "comment": "Main manuscript: 10 pages, 4 figures. Supplementary Information: 9 pages, 5 figures",
  "categories": [
    "quant-ph",
    "physics.optics"
  ],
  "abstract": "The nitrogen-vacancy center in diamond, owing to its optically addressable and long-lived electronic spin, is an attractive resource for the generation of remote entangled states. However, the center's low native fraction of coherent photon emission, $\\sim$3\\%, strongly reduces the achievable spin-photon entanglement rates. Here, we couple a nitrogen-vacancy center with a narrow extrinsically broadened linewidth (\\unit[159]{MHz}), hosted in a micron-thin membrane, to the mode of an open optical microcavity. The resulting Purcell factor of $\\sim$1.8 increases the fraction of zero-phonon line photons to above 44\\%, leading to coherent photon emission rates exceeding four times the state of the art under non-resonant excitation. Bolstered by the enhancement provided by the cavity, we for the first time measure resonance fluorescence without any temporal filtering with $>$10 signal-to-laser background ratio. Our microcavity platform would increase spin-spin entanglement success probabilities by more than an order of magnitude compared to existing implementations. Selective enhancement of the center's zero-phonon transitions could furthermore unlock efficient application of quantum optics techniques such as wave-packet shaping or all-optical spin manipulation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-03-07T15:57:57.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "nitrogen-vacancy center",
      "cavity-assisted resonance fluorescence",
      "photon emission rates exceeding",
      "coherent photon emission",
      "first time measure resonance fluorescence"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}