Two-layer structure for high spatial frequency optical data recording based on multinary chalcogenide semiconductors

We report a photosensitive composite structure consisting of chalcogenide glassy semiconductors and copolymeric thermoplastic materials. Our researches were aimed to find out new approaches of using photothermoplastic materials. (PTPM) as two-layered media for holographic and optical data recording. This approach was based on creating the modified PTPM structures with enhanced characteristics as well as on performing the new processes of recording onto PTPM. Some modifications in the recording procedure and equipment setup were carried out. It is established that PTPM systems based on donor-acceptor layers have a photosensitivity of 10 -3 to 10 -4 J/cm 2 . The introduction into them an additive of photochromic dye increases the photosensitivity of donor-acceptor systems by 2 - 3 times. The essential growth in photosensitivity is observed in the blue-to-green range of spectrum. A method of photothermoplastic recording of holograms on a PTPM with a photosensitive layer of chalcogenide glassy semiconductors is proposed. Storing the whole data file of holograms followed by their development does the recording of optical information.