{
  "id": "1610.01530",
  "version": "v1",
  "published": "2016-10-05T17:05:48.000Z",
  "updated": "2016-10-05T17:05:48.000Z",
  "title": "Thermal transport in suspended silicon membranes measured by laser-induced transient gratings",
  "authors": [
    "Alejandro Vega-Flick",
    "Ryan A. Duncan",
    "Jeffrey K. Eliason",
    "John Cuffe",
    "Jeremy A. Johnson",
    "Jean-Philippe M. Peraud",
    "Lingping Zeng",
    "Zhengmao Lu",
    "Alexei A. Maznev",
    "Evelyn N. Wang",
    "Juan Jose Alvarado-Gil",
    "Marianna Sledzinska",
    "Clivia Sotomayor-Torres",
    "Gang Chen",
    "Keith A. Nelson"
  ],
  "comment": "23 pages, 7 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Studying thermal transport at the nanoscale poses formidable experimental challenges due both to the physics of the measurement process and to the issues of accuracy and reproducibility. The laser-induced transient thermal grating (TTG) technique permits non-contact measurements on nanostructured samples without a need for metal heaters or any other extraneous structures, offering the advantage of inherently high absolute accuracy. We present a review of recent studies of thermal transport in nanoscale silicon membranes using the TTG technique. An overview of the methodology, including an analysis of measurements errors, is followed by a discussion of new findings obtained from measurements on both solid and nanopatterned membranes. The most important results have been a direct observation of non-diffusive phonon-mediated transport at room temperature and measurements of thickness-dependent thermal conductivity of suspended membranes across a wide thickness range, showing good agreement with first-principles-based theory assuming diffuse scattering at the boundaries. Measurements on a membrane with a periodic pattern of nanosized holes indicated fully diffusive transport and yielded thermal diffusivity values in agreement with Monte Carlo simulations. Based on the results obtained to-date, we conclude that room-temperature thermal transport in membranebased silicon nanostructures is now reasonably well understood.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-10-05T17:05:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "thermal transport",
      "laser-induced transient gratings",
      "suspended silicon membranes",
      "theory assuming diffuse scattering",
      "nanoscale poses formidable experimental challenges"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 23,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}