Effect of electron-induced dichroism in vitreous As2S3

O. Shpotyuk, V. Balitska, M. Vakiv.

Journal of Non-Crystalline Solids, vol. 227-230, 1998, p. 837-841.

Abstract

Spectral and temperature dependencies of the effect of electron-induced dichroism, its stability at room temperature, as well as microstructural mechanism are investigated in cubic samples of vitreous As2S3. It is shown that this effect is observed in the region of optical absorption edge. The corresponding spectral dependence has an exponential form with an edge in the short-wave region and an extended ‘tail’ in the long-wave direction. The dichroism disappears completely at room temperature after >10 days or at the annealing to 425 K. The dichroism mechanism is connected with electron-induced formation of new oriented relatively to electron flow. defects in the form of undercoordinated atomic pairs.

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