Self-Trapped Excitons in Amorphous and Crystalline SiO2

  • Noriaki Itoh
  • Katsumi Tanimura
  • Chihiro Itoh


Properties of the self-trapped excitons in amorphous and crystalline SiO2 studied through transient volume and optical absorption change and luminescence are compared. It is emphasized that local lattice relaxation induced upon electronic excitation in crystalline and amorphous materials is similar except that the time decay of the self-trapped excitons in the amorphous is non-exponential. Based on the fact that the self-trapped exciton in crystalline SiO2 is a close vacancy-interstitial pair, we propose a new mechanism for the luminescence in amorphous SiO2 exhibiting a non-exponential time decay.


Amorphous Material Electron Pulse Decay Time Constant Large Stokes Shift Radiative Recombination Rate 
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Copyright information

© Plenum Press, New York 1988

Authors and Affiliations

  • Noriaki Itoh
    • 1
  • Katsumi Tanimura
    • 1
  • Chihiro Itoh
    • 1
  1. 1.Department of Physics Faculty of ScienceNagoya UniversityFuro-cho, Chikusaku, NagoyaJapan

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