Composition dependence of physical and optical properties in Ge-As-S chalcogenide glasses

Yan Yang, Zhiyong Yang, Pierre Lucas, Yuwei Wang, Zhijie Yang, Anping Yang, Bin Zhang, Haizheng Tao

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

The composition dependence of density (d), refractive index (n) and optical bandgap (Eg) of Ge-As-S chalcogenide glasses is investigated. It is shown that d correlates linearly with sulfur content but relatively poorly with the mean coordination number (MCN). It is also shown that n does not correlate directly with d, and instead a semi-empirical relation based on the molar refractivity (R) of Ge, As and S is derived, permitting to predict n from d with <1% error. A convenient method based on diffuse reflectance is proposed to measure Eg of Ge-As-S glasses with good accuracy. It is shown that the value of Eg is dominated by the S content. These findings make it convenient to tailor the physical and optical properties of glasses in Ge-As-S system.

Original languageEnglish (US)
Pages (from-to)38-42
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume440
DOIs
StatePublished - May 15 2016

Keywords

  • Chalcogenide glasses
  • Diffuse reflectance spectrum
  • Optical bandgap
  • Refractive index

ASJC Scopus subject areas

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

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