Novel photoinduced anisotropy in amorphous As50Se50 films at near the glass transition temperature

The results of an experimental study of high-temperature measurements of photoinduced anisotropy and the first Raman spectra of the photoinduced anisotropic state of amorphous As50Se50 films are given. Two novel photo-anisotropic phenomena were observed near the glass-transition temperature, T-g, and a possible explanation of these phenomena in terms of light-induced preferential bond breaking within crystalline clusters or rotation of these clusters is suggested. (C) 1998 Elsevier Science B.V. All rights reserved.