Time-Resolved Surface Photoelectron Spectroscopy of Photoexcited Electron and Hole Dynamics on GaAs Using 92 eV Laser Harmonic Source

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著者

    • Kato Keiko Kato Keiko
    • NTT Basic Research Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa 243-0198, Japan
    • Gotoh Hideki
    • NTT Basic Research Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa 243-0198, Japan
    • Tateno Kouta
    • NTT Basic Research Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa 243-0198, Japan
    • Sogawa Tetsuomi
    • NTT Basic Research Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa 243-0198, Japan
    • Nakano Hidetoshi
    • NTT Basic Research Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa 243-0198, Japan

抄録

We have developed a time-resolved surface photoelectron spectroscopy system based on a 1.5 eV laser-pump and 92 eV high-order harmonic probe configuration that enables us to measure the electron and hole dynamics on a semiconductor surface. Core-level photoelectron spectra of GaAs(001) were successfully obtained with a single 59th harmonic, which was selected by using a pair of Mo/Si multilayer mirrors with a narrow reflection bandwidth. We observed transient energy shifts of the Ga 3d core level photoelectron peak of approximately 200 meV towards a higher binding energy, indicating that the surface potential changed due to the spatial separation of electron--hole pairs generated by the laser irradiation. The relatively slow recovery of the Ga 3d core level shift with a time constant of a few ns is dominated by the recombination process of the excess surface charges generated by the laser irradiation.

収録刊行物

  • Jpn J Appl Phys

    Jpn J Appl Phys 51(7), 072401-072401-6, 2012-07-25

    The Japan Society of Applied Physics

各種コード

  • NII論文ID(NAID)
    150000104274
  • NII書誌ID(NCID)
    AA12295836
  • 本文言語コード
    EN
  • 雑誌種別
    大学紀要
  • ISSN
    00214922
  • NDL 記事登録ID
    023830043
  • NDL 請求記号
    Z53-A375
  • データ提供元
    NDL  JSAP 
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