{
  "id": "1602.08453",
  "version": "v1",
  "published": "2016-02-26T19:52:08.000Z",
  "updated": "2016-02-26T19:52:08.000Z",
  "title": "Thermal noise and optomechanical features in the emission of a membrane-coupled compound cavity laser diode",
  "authors": [
    "Lorenzo Baldacci",
    "Alessandro Pitanti",
    "Luca Masini",
    "Andrea Arcangeli",
    "Francesco Colangelo",
    "Daniel Navarro-Urrios",
    "Alessandro Tredicucci"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "physics.optics"
  ],
  "abstract": "We demonstrate the use of a compound optical cavity as linear displacement detector, by measuring the thermal motion of a silicon nitride suspended membrane acting as the external mirror of a near-infrared Littrow laser diode. Fluctuations in the laser optical power induced by the membrane vibrations are collected by a photodiode integrated within the laser, and then measured with a spectrum analyzer. The dynamics of the membrane driven by a piezoelectric actuator is investigated as a function of air pressure and actuator displacement in a homodyne configuration. The high Q-factor ($\\sim 3.4\\cdot 10^4$ at $8.3 \\cdot 10^{-3}$ mbar) of the fundamental mechanical mode at $\\sim 73$ kHz guarantees a detection sensitivity high enough for direct measurement of thermal motion at room temperature ($\\sim 87$ pm RMS). The compound cavity system here introduced can be employed as a table-top, cost-effective linear displacement detector for cavity optomechanics. Furthermore, thanks to the strong optical nonlinearities of the laser compound cavity, these systems open new perspectives in the study of non-Markovian quantum properties at the mesoscale.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-02-26T19:52:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "membrane-coupled compound cavity laser diode",
      "thermal noise",
      "optomechanical features",
      "linear displacement detector",
      "nitride suspended membrane acting"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}