{
  "id": "2406.04556",
  "version": "v1",
  "published": "2024-06-07T00:10:47.000Z",
  "updated": "2024-06-07T00:10:47.000Z",
  "title": "Photon emission by hot electron injection across a lateral \\textit{pn} junction",
  "authors": [
    "S. Norimoto",
    "R. Saxena",
    "P. See",
    "A. Nasir",
    "J. P. Griffiths",
    "C. Chen",
    "D. A. Ritchie",
    "M. Kataoka"
  ],
  "comment": "8 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We demonstrate a method to generate photons by injecting hot electrons into a {\\it pn} junction within a \\ce{GaAs/AlGaAs} heterostructure. Hot electrons are generated by biasing across a mesoscopic potential in {\\it n}-type region and travel toward {\\it p}-type region through quantum Hall edge channel in the presence of magnetic field perpendicular to the substrate. The {\\it p}-type region is created several microns away from the hot electron emitter by inducing interfacial charges using a surface gate. The energy relaxation of the hot electrons is suppressed by separating the orbitals before and after longitudinal-optical (LO) phonon emission. This technique enables the hot electrons to reach the {\\it p}-type region and to recombine with induced holes followed by photon emissions. Hot electron-induced hole recombination is confirmed by a peak around \\qty{810}{nm} in an optical spectrum that corresponds to excitonic recombination in a \\ce{GaAs} quantum well. An asymmetric structure observed in the optical spectrum as a function of the magnetic field originates from the chiral transport of the hot electrons in the Hall edge channel. We propose the combination of our technology and on-demand single-electron source would enable the development of an on-demand single photon source that is an essential building block to drive an optical quantum circuit and to transfer quantum information for a long distance.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-06-07T00:10:47.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "hot electron injection",
      "photon emission",
      "quantum hall edge channel",
      "on-demand single photon source",
      "transfer quantum information"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}