Cause of the 5.0 ev absorption band in pure silica glass

Ryoichi Tohmon*, Yoshiya Yamasaka, Kaya Nagasawa, Yoshimichi Ohki, Yoshimasa Hama

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


The optical absorption band at 5.0 eV (the 'B2 band') is classified into two types (B2α: and B2β), each having different photoluminescence peak, half width, and decreasing characteristic by heat treatment. The 7.6 eV absorption band is found in samples with the B2α band. The 7.6 eV and the B2α bands are caused by the same oxygen vacancy in the form of {triple bond, long}Si-Si{triple bond, long}. The former band is due to a singlet-to-singlet transition, while the latter to a singlet-totriplet transition.

Original languageEnglish
Pages (from-to)671-678
Number of pages8
JournalJournal of Non-Crystalline Solids
Issue numberPART 2
Publication statusPublished - 1987 Dec 1

ASJC Scopus subject areas

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


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