PHOTOINDUCED EFFECTS IN AMORPHOUS CHALCOGENIDES

Exposure of many amorphous chalcogenides can change their structure, r eactivity, and optical and other properties, New results of the study of photoinduced effects are presented and reviewed. Both reversible an d irreversible photoinduced effects and changes of short-range order h ave been studied by Raman and IR spectroscopy in As-S layers, The effe cts of photodoping, chemical modification. photoinduced surface deposi tion, optically induced changes of reactivity and their dependence on the structure as well as mechanisms of optically induced effects are d iscussed, Attention is also paid to photoinduced effects in different materials, The photoinduced changes of structure and properties can be applied in high-resolution litography, for optical storage, in produc tion of photoresists, optical diffraction elements, planar optoelectro nic parts and circuits. Some of these applications are also mentioned.