Kinetics of enhanced photogeneration of E′ centers in oxygen-deficient silica

Hiroyuki Nishikawa*, Eiki Watanabe, Daisuke Ito, Yoshimichi Ohki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


The kinetics of the generation of E′ centers induced by a 6.4 eV excimer laser were investigated. Enhanced defect generation was observed in OH-containing oxygen-deficient silicas. The increased E′ centers were found to be correlated with an absorption band at 5.7 eV. The intensity of the 5.7 eV band α, as a function of the laser fluence, F, follows a simple formula of α(F) = αs[1 - exp(- DF)], where the values of αs and the decay coefficient, D, depend on the concentrations of SiH and SiOH bonds.

Original languageEnglish
Pages (from-to)179-184
Number of pages6
JournalJournal of Non-Crystalline Solids
Issue numberC
Publication statusPublished - 1994 Nov 4

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry


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