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The optical anisotropy induced in films of some chalcogenide vitreous semiconductors (ChVS) by linearly polarized light is studied. The spectral responses of the photoinduced dichroism are compared with the transmission spectra of the illuminated films. The phenomenon of photoinduced anisotropy is associated with the existence of highly‐dispersed, optically anisotropic structure elements in the isotropic (on the average) ChVS films.

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An experimental research of thermal and optical bleaching in the chalcogenide vitreous semiconductors of the As–Se system and in elemental vitreous selenium hasbeen carried out. A strong dependence of the bleaching features on the ratio of the components is shown. To explain the bleaching process the configurational model of two states (ground one and metastable one) between which optical and thermal transitions can occur is proposed.

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