Universal feature of photo-induced volume changes in chalcogenide glasses

J. Hegedüs, K. Kohary, S. Kugler

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We have investigated in chalcogenide glasses the microscopic processes caused by illumination using tight-binding molecular dynamics computer simulation. After photon absorption we treated the excited electron and hole independently. We found covalent bond breaking in amorphous networks with photo-induced excited electrons, whereas excited holes contribute to the formation of inter-chain bonds. We also observed a correlated macroscopic volume change of the amorphous sample. Our results provide a new and universal description, which can explain simultaneously the photo-induced volume expansion and shrinkage. This model is supported by the results of recent measurements.

Original languageEnglish
Pages (from-to)1587-1590
Number of pages4
JournalJournal of Non-Crystalline Solids
Volume352
Issue number9-20 SPEC. ISS.
DOIs
Publication statusPublished - Jun 15 2006

Keywords

  • Chalcogenides
  • Molecular dynamics

ASJC Scopus subject areas

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

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