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Compositional dependence of refractive index and Raman spectra of Ge(SxSe1-x)2 glasses

JUN ZHANG1,2, HAIYAN XIAO1,* , JIE ZHANG1,3

Affiliation

  1. State Key Laboratory of Silicate Materials for Architecture (Wuhan University of Technology), Wuhan 430070, P.R.China
  2. China Triumph International Engineering Co., Ltd., Shanghai 200063, P.R. China
  3. State Key Laboratory of New Ceramic and Fine Processing (Tsinghua University), Beijing 62772556, China

Abstract

Ge(SxSe1-x)2 Pseudo-binary chalcogenide glasses with rather wider range from x=0 to 1 were obtained through the well-established melt-quenching technique. Utilizing Raman scattering technique, the gradual redistribution of tetrahedral units [GeS4-nSen] (n=0,1,2 ,3 and 4) in Ge(SxSe1-x)2 glasses following the substitution of Sulfur by Selenium or vice versa were clearly exhibited through the evolution of their characteristic Raman spectral peaks especially in the range of 210～ 310cm-1, which indicate that the structural units and their cross-linking manner of the Ge(SxSe1-x)2 glasses is basically identical with GeS2 or GeSe2 glasses. Based on these micro-structural analysis, the linear evolution of refractive index of these Ge(SxSe1-x)2 glasses together with the gradual blue shift of short-wave absorptive edge λvis following the substitution of S by Se can be elucidated reasonably..

Keywords

Chalcogenide glasses, Raman scattering, Refractive index, Ge(SxSe1-x)2 glasses.

Submitted at: April 22, 2011
Accepted at: July 25, 2011

Citation

JUN ZHANG, HAIYAN XIAO, JIE ZHANG, Compositional dependence of refractive index and Raman spectra of Ge(SxSe1-x)2 glasses, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 7, pp. 848-851 (2011)