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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Zhdanov et al. (1979) studied this question.