{
  "id": "1611.02415",
  "version": "v1",
  "published": "2016-11-08T07:39:39.000Z",
  "updated": "2016-11-08T07:39:39.000Z",
  "title": "Time-resolved spectroscopy with entangled photons",
  "authors": [
    "Dmitry A. Kalashnikov",
    "Elizaveta V. Melik-Gaykazyan",
    "Alexey A. Kalachev",
    "Ye Feng Yu",
    "Arseniy I. Kuznetsov",
    "Leonid A. Krivitsky"
  ],
  "comment": "Submitted for publication",
  "categories": [
    "quant-ph",
    "physics.ins-det",
    "physics.optics"
  ],
  "abstract": "Interaction of light with media often occurs with a femtosecond response time. Its measurement by conventional techniques requires the use of femtosecond lasers and sophisticated time-gated optical detection1-3. Here we demonstrate that by exploiting quantum interference of entangled photons it is possible to measure the phase relaxation time of a media on the femtosecond time scale (down to 100 fs) using accessible continuous wave laser and single-photon counting. We insert the sample in the Hong-Ou-Mandel interferometer4 and infer the phase relaxation time from the modification of the two-photon interference pattern. In addition to its simplicity and ease of use, the technique does not require compensation of group velocity dispersion5-8 and does not induce photo-damage of the samples. This technique will be useful for characterization of ultrafast phase relaxation processes in material science, chemistry, and biology.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-11-08T07:39:39.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "entangled photons",
      "time-resolved spectroscopy",
      "phase relaxation time",
      "ultrafast phase relaxation processes",
      "femtosecond response time"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}