{
  "id": "1203.3994",
  "version": "v2",
  "published": "2012-03-18T20:12:43.000Z",
  "updated": "2012-12-05T17:10:10.000Z",
  "title": "Observation of Coulomb-Assisted Dipole-Forbidden Intraexciton Transitions in Semiconductors",
  "authors": [
    "W. D. Rice",
    "J. Kono",
    "S. Zybell",
    "S. Winnerl",
    "J. Bhattacharyya",
    "H. Schneider",
    "M. Helm",
    "B. Ewers",
    "A. Chernikov",
    "M. Koch",
    "S. Chatterjee",
    "G. Khitrova",
    "H. M. Gibbs",
    "L. Schneebeli",
    "B. Breddermann",
    "M. Kira",
    "S. W. Koch"
  ],
  "comment": "5 pages, 3 figures",
  "journal": "Physical Review Letters 110, 137404 (2013)",
  "doi": "10.1103/PhysRevLett.110.137404",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We use terahertz pulses to induce resonant transitions between the eigenstates of optically generated exciton populations in a high-quality semiconductor quantum-well sample. Monitoring the excitonic photoluminescence, we observe transient quenching of the $1s$ exciton emission, which we attribute to the terahertz-induced $1s$-to-$2p$ excitation. Simultaneously, a pronounced enhancement of the $2s$-exciton emission is observed, despite the $1s$-to-$2s$ transition being dipole forbidden. A microscopic many-body theory explains the experimental observations as a Coulomb-scattering mixing of the 2$s$ and 2$p$ states, yielding an effective terahertz transition between the 1$s$ and 2$s$ populations.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2012-12-05T17:10:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "coulomb-assisted dipole-forbidden intraexciton transitions",
      "observation",
      "microscopic many-body theory explains",
      "exciton emission",
      "high-quality semiconductor quantum-well sample"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012arXiv1203.3994R"
    }
  }
}