{
  "id": "1711.10454",
  "version": "v1",
  "published": "2017-11-28T18:34:10.000Z",
  "updated": "2017-11-28T18:34:10.000Z",
  "title": "Femtosecond valley polarization and topological resonances in transition metal dichalcogenides",
  "authors": [
    ". Azar Oliaei Motlagh",
    "Jhih-Sheng Wu",
    "Vadym Apalkov",
    "Mark I. Stockman"
  ],
  "comment": "7 pages, 7 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci",
    "physics.optics",
    "quant-ph"
  ],
  "abstract": "We predict a possibility to induce a significant valley polarization in a transition metal dichalcogenide (TMDC) (i.e., $\\mathrm{MoS_2}$ and $\\mathrm{WS_2}$) monolayer by a fundamentally-shortest circularly-polarized optical pulse consisting of just a single oscillation with duration of a few femtoseconds and a moderate amplitude of $0.2-0.5~\\mathrm V/\\mathrm{\\AA}$. The resulting distribution of electrons in reciprocal space is highly structured and defined by a combination of the atomic-orbital angular momentum conservation and topological resonances that we introduce. These valley degrees of freedom in TMDCs can be used for information processing in PHz-band optoelectronics.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-11-28T18:34:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "transition metal dichalcogenide",
      "femtosecond valley polarization",
      "topological resonances",
      "atomic-orbital angular momentum conservation",
      "circularly-polarized optical pulse consisting"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}