Semiconductor Physics, Quantum Electronics & Optoelectronics. 2007. V. 10, N 3. P. 023-027.

On the problem of relaxation for radiation-induced optical effects in some ternary chalcogenide glasses
O.I. Shpotyuk1,3, M.M. Vakiv1, B. Butkiewicz2, A.P. Kovalskiy1, and R.Ya. Golovchak1,4

1Scientific Research Company "Carat", 202, Stryjska str., 29031 Lviv, Ukraine
2Institute of Electronic Systems, Warsaw University of Technology, 15/19, Nowowiejska Str., Warsaw 00-665, Poland
3Physics Institute, Pedagogical University of Czestochowa, 13/15, Al. Armii Krajowej, Czestochowa 42-415, Poland
4Ivan Franko Lviv National University, Physics Department 50, Dragomanov str., 29005 Lviv, Ukraine

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 As 2 S 3 -GeS 2 and non-stoichiometric As 2 S 3 -Ge 2 S 3 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.

Keywords: irradiation, chalcogenide glass, absorption, relaxation.

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