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ON THE PHOTO-DARKENING IN SOME Ge-As-S GLASSES

M. Štábl1, L.Tichý1,*

Affiliation

  1. Joint Laboratory of Solid State Chemistry of Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic

Abstract

In the series of Ge-As-S bulk glasses the maximum in photo-darkening sensitivity was found for the chemical compositions where the mean coordination number lies in the region 2.6-2.7. This result is in agreement with the original result by Tanaka et al. [1]. Far infrared and Raman spectra indicate that these glasses are most probably, in the sense of Boolchand`s approach, nano-phase separated. It is suggested that nano-phase separation contributes to the molecular like character of the glasses and it enhances the ability of material to photoinduced changes in intermolecular interaction which assists the photo-darkening..

Keywords

Chalcogenide glasses, Photo-darkening, Nano-phase separation.

Submitted at: June 20, 2004
Accepted at: June 22, 2004

Citation

M. Štábl, L.Tichý, ON THE PHOTO-DARKENING IN SOME Ge-As-S GLASSES, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 3, pp. 781-786 (2004)