{
  "id": "1403.1619",
  "version": "v1",
  "published": "2014-03-06T23:00:37.000Z",
  "updated": "2014-03-06T23:00:37.000Z",
  "title": "The Franz-Keldysh effect revisited: Electroabsorption including interband coupling and excitonic effects",
  "authors": [
    "Federico Duque-Gomez",
    "J. E. Sipe"
  ],
  "comment": "17 pages, 11 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.other",
    "physics.optics"
  ],
  "abstract": "We study the linear optical absorption of bulk semiconductors in the presence of a homogeneous constant (dc) electric field with an approach suitable for including excitonic effects while working with many-band models. The absorption coefficient is calculated from the time evolution of the interband polarization excited by an optical pulse. We apply the formalism to a numerical calculation for GaAs using a 14-band $\\textbf{k} \\cdot \\textbf{p}$ model, which allows us to properly include interband coupling, and the exchange self-energy to account for the excitonic effects due to the electron-hole interaction. The Coulomb interaction enhances the features of the absorption coefficient captured by the $\\textbf{k} \\cdot \\textbf{p}$ model. We consider the dependence of the enhancement on the strength of the dc field and the polarization of the optical field.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-03-06T23:00:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "excitonic effects",
      "franz-keldysh effect",
      "interband coupling",
      "electroabsorption",
      "absorption coefficient"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1016/j.jpcs.2014.07.023",
      "journal": "Journal of Physics and Chemistry of Solids",
      "year": 2015,
      "month": "Jan",
      "volume": 76,
      "pages": 138
    },
    "note": {
      "typesetting": "TeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015JPCS...76..138D"
    }
  }
}