The temperature dependence of photoinduced fluidity in chalcogenide glasses: a Raman spectroscopic study

Abstract

Raman spectroscopy has been utilized in an attempt to elucidate the temperature dependence of the photoinduced fluidity (PF) effect in chalcogenide glasses. As 2S 3 and As 25S 75 fibers kept under elongation stress have been illuminated with various radiation energies while in situ Raman spectra have been collected. Changes in the depolarization ratio are employed as an indicator of the photostructural changes involved in the PF effect. The results show anomalous behavior for the temperature dependence of PF. Furthermore, the PF effect becomes less appreciable for glass compositions that correspond to structures with higher flexibility.