On the problem of relaxation for radiation-induced optical effects in some ternary chalcogenide glasses

Abstract

We have investigated the influence of high-energy γ-irradiation on the optical transmission spectra of ternary Ge-As-S chalcogenide glasses of the stoichiometric As₂S₃-GeS₂ and non-stoichiometric As₂S₃-Ge₂S₃ systems. A long-wave shift of the fundamental absorption edge is observed for all glasses. Two different components of radiation-induced changes were specified: static (residual) and dynamic (time dependent) ones. The dynamic component is mathematically described by the exponential and power functions in respect to post-irradiation periods. It is shown that quantitative features of the observed self-restoration phenomena in the irradiated glasses are closely related to their chemical compositions and stoichiometry.