Kinetics of light-assisted physical ageing in chalcogenide glasses

A fundamental understanding of glass relaxation under ambient temperatures, as well as under the external influences is vital to the glass and polymer science communities. Our results show that kinetics of light-assisted physical aging in Se-based glasses can be well fitted with stretch-exponential Kohlrausch type function, which exponent beta and the effective time relaxation constant tau depend on the wavelength of incident photons. The obtained beta values for Se-rich glasses group around 3/7 and 1/3 values, predicted by Phillips field-free and field-forced axiomatic diffusion-to-traps models.