Kinetics of light-assisted physical ageing in S-rich arsenic sulphide glasses

[摘要] The obtained results show that kinetics of light-assisted physical ageing in S-rich glasses can be well fitted with stretch-exponential Kohlrausch-type function, in which exponent $\beta$-values and the effective time relaxationconstant τ depend on the wavelength of incident photons. The obtained $\beta$-values exhibit well-expressedminimum for the structural relaxation stimulated by light with energy of quanta comparable with the optical gap of the material. This effect is found to be similar to Se-rich glasses.

[学科分类] 材料工程

[关键词] Chalcogenide glass;ageing;calorimetry;relaxation.