Photoinduced structural relaxation in chalcogenide glasses

Pierre Lucas, Anand Doraiswamy, Ellyn A. King

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


Measurements of residual entropy were performed on irradiated chalcogenide glasses using a modulated differential scanning calorimeter. We show that glass from the GexSe1-x system can undergo extensive structural relaxation under sub-bandgap irradiation. This ability to relax is correlated with the strong/fragile character of the glass-forming system. Fragile glassformers experience larger relaxation as expected from the Kauzmann entropy plot. The temperature dependence of this photorelaxation process is also consistent with entropy relaxation. These measurements demonstrate that the glass configurational entropy decreases under irradiation. This can be regarded as a light activated aging process.

Original languageEnglish (US)
Pages (from-to)35-42
Number of pages8
JournalJournal of Non-Crystalline Solids
Issue number1-3
StatePublished - Dec 15 2003

ASJC Scopus subject areas

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


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