{
  "id": "2105.10734",
  "version": "v1",
  "published": "2021-05-22T13:50:13.000Z",
  "updated": "2021-05-22T13:50:13.000Z",
  "title": "Non-Degenerate Two-Photon Absorption in ZnSe: Experiment and Theory",
  "authors": [
    "L. Krauss-Kodytek",
    "W. -R. Hannes",
    "T. Meier",
    "C. Ruppert",
    "M. Betz"
  ],
  "comment": "6 pages, 5 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We experimentally and theoretically investigate the non-degenerate two-photon absorption coefficient $\\beta(\\omega_1,\\omega_2)$ in the prototypical semiconductor ZnSe. In particular, we provide a comprehensive data set on the dependence of $\\beta(\\omega_1,\\omega_2)$ on the non-degeneracy parameter $\\omega_1/\\omega_2$ with the total frequency sum $\\omega_1+\\omega_2$ kept constant. We find a substantial increase of the two-photon absorption strength with increasing $\\omega_1/\\omega_2$. In addition, different crystallographic orientations and polarization configurations are investigated. The nonlinear optical response is analyzed theoretically by evaluating the multiband semiconductor Bloch equations including inter- and intraband excitations in the length gauge. The band structure and the matrix elements are taken an eight-band k.p model. The simulation results are in very good agreement with the experiment.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-05-22T13:50:13.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "experiment",
      "non-degenerate two-photon absorption coefficient",
      "multiband semiconductor bloch equations",
      "two-photon absorption strength",
      "total frequency sum"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}