{
  "id": "1209.4833",
  "version": "v1",
  "published": "2012-09-21T14:44:43.000Z",
  "updated": "2012-09-21T14:44:43.000Z",
  "title": "Microscopic mechanism for transient population inversion and optical gain in graphene",
  "authors": [
    "Torben Winzer",
    "Ermin Malic",
    "Andreas Knorr"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "A transient femtosecond population inversion in graphene was recently reported by Li et al., Phys. Rev. Lett. 108, 167401 (2012). Based on a microscopic theory we clarify the underlying microscopic mechanism: Transient gain and population inversion in graphene occurs due to a complex interplay of strong optical pumping and carrier cooling that fills states close to the Dirac point giving rise to a relaxation bottleneck. The subsequent femtosecond decay of the optical gain is mainly driven by Coulomb-induced Auger recombination.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-09-21T14:44:43.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "78.67.Wj",
      "73.22.Pr",
      "78.45.+h",
      "78.47.jg"
    ],
    "keywords": [
      "transient population inversion",
      "optical gain",
      "transient femtosecond population inversion",
      "fills states close",
      "dirac point giving rise"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevB.87.165413",
      "journal": "Physical Review B",
      "year": 2013,
      "month": "Apr",
      "volume": 87,
      "number": 16,
      "pages": 165413
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvB..87p5413W"
    }
  }
}