Ultrafast Dynamics of Exciton–Exciton and Exciton–Longitudinal Optical-Phonon Scattering Processes in ZnO Epitaxial Thin Films

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著者

    • Takeda Jun Takeda Jun
    • Department of Physics, Graduate School of Engineering, Yokohama National University, Yokohama 240-8501, Japan
    • Ko Hang-Ju
    • Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
    • Yao Takafumi
    • Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

抄録

Time-resolved luminescence spectra due to the exciton–exciton collision process were measured in ZnO thin films under excitonic resonant and band-to-band excitations by the optical Kerr gate technique. The luminescence due to the exciton–exciton collision process instantaneously emerges under excitonic resonant excitation, while it emerges with a delay of a few picoseconds under band-to-band excitation. The time delay observed indicates that, first, exciton–longitudinal optical (LO)-phonon scattering occurs and, then, the exciton–exciton collision process takes place after the completion of the thermal cooling of excitons through the cascade emission of multiple LO-phonons. The time delay is quantitatively evaluated by a simple calculation based on the exciton–LO-phonon scattering process.

収録刊行物

  • Japanese journal of applied physics. Pt. 1, Regular papers & short notes  

    Japanese journal of applied physics. Pt. 1, Regular papers & short notes 45(9A), 6961-6963, 2006-09-15 

    Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physics

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各種コード

  • NII論文ID(NAID)
    10018245855
  • NII書誌ID(NCID)
    AA10457675
  • 本文言語コード
    EN
  • 資料種別
    ART
  • 雑誌種別
    大学紀要
  • ISSN
    0021-4922
  • NDL 記事登録ID
    8055825
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z53-A375
  • データ提供元
    CJP書誌  NDL  JSAP 
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