Mishak O. Photo- and thermoinduced transformations in thin layers and multilayer nanostructures from chalcogenide glasses

Investigation object: thin films and multilayer nanostructures based on lightsensitive chalcogenide glasses for optical information recording. Investigation purpose: proof of influence of spatial structuring of glasses, layers based on As-S(Se,Te) systems, including amorphous selenium, on the processes of photo- and thermoinduced transformations in them as well establishment of optical information recording conditions in this type of recording media. Investigation methods and apparatus: electron and atomic force microscopy, X-ray diffraction, investigation of optical and infrared absorption, Raman scattering, measure of optical information recording parameters and optical relief relaxation in holographic mode. Theoretical and practical results, novelty of new-applied: The model of photoinduced instabilities, which are formed in quasihomogeneous amorphous medium with random fluctuations under external radiation, is developed. The modeling and parameters calculations of optical relief recording processe s in nanostructured layer are carried out. The new type of lightsensitive films for optical information recording in real time scale, which parameters are operated by nanostructure geometry, is developed. Degree of application: It is planned. Sphere (area) of application: media for optical recording, fabrication of holographic optical elements.