{
  "id": "1805.08467",
  "version": "v1",
  "published": "2018-05-22T09:15:58.000Z",
  "updated": "2018-05-22T09:15:58.000Z",
  "title": "Off-resonant emission of photon pairs in nonlinear optical cavities",
  "authors": [
    "Valentin A. Averchenko",
    "Gerhard Schunk",
    "Michael Förtsch",
    "Martin Fischer",
    "Dmitry V. Strekalov",
    "Gerd Leuchs",
    "Christoph Marquardt"
  ],
  "categories": [
    "quant-ph"
  ],
  "abstract": "Cavity-assisted spontaneous parametric down-conversion (SPDC) and spontaneous four-wave mixing (SFWM) in nonlinear optical materials are practical and versatile methods to generate narrowband time-energy entangled photon pairs. Time-energy entangled photons with tailored spectro-temporal properties are particularly useful for efficient quantum optical interfaces. In this work we study the generation of photon pairs in cavity-assisted SPDC and SFWM for the general case of off-resonant conversion, namely, when the frequencies of the generated photons do not match the cavity resonances. Such a frequency mismatch in particular depends on temperature and requires an additional control in the experiment. First, we propose a generic model, for description of cavity-assisted SPDC and SFWM. We show that in both processes the mismatch reduces the generation rate of photons, distorts the spectrum and the auto-correlation function of the generated fields, as well as affects the photon generation dynamics. Second, we verify the results experimentally using parametric generation of photon pairs in a nonlinear whispering gallery mode resonator (WGMR) as an experimental platform with controlled frequency mismatch. Our work reveals the role of the frequency mismatch in the photon generation process and shows a way to control it. Obtained results constitute one more step in the direction of full control over the spectro-temporal properties of entangled photon pairs and the heralded generation of single-photon pulses with a tailored temporal mode.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-05-22T09:15:58.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "nonlinear optical cavities",
      "off-resonant emission",
      "whispering gallery mode resonator",
      "time-energy entangled photon pairs",
      "narrowband time-energy entangled photon"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}