On the mechanism of radiation-induced optical effects in vitreous
As22S3-GeS2 (download
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O.I. Shpotyuk, R.Ya. Golovchak, A.P. Kovalskiy, V. Pamukchieva, E. Skordeva, D. Arsova
A coordination defects formation model based on the concept of covalent chemical bond switching was developed for the microstructural explanation of ?-induced optical effects in As2S3-GeS2 chalcogenide glasses. The whole variety of possible destruction-polymerization transformations was considered separately for the “pure” vitreous v-As2S3 and v-GeS2, as well as for the mixed v-As2S3-GeS2 compositions. The topological schemes of the coordination defect formation were proposed, taking into account results obtained by the IR Fourier spectroscopy method of additional reflectivity in 400-200 cm-1 range.
Key words: optical transmittance, chalcogenide vitreous semiconductors, gamma-irradiation
PACS: 78.30.Ly
doi 10.3116/16091833/3/2/134/2002