The IR photoinduced changes in the Y-Ba-Cu-O thin films

The Y-Ba-Cu-O thin films are promising materials because they have not only superconducting properties but also good optical properties, particularly in the IR spectral range. We investigate the photoinduced optical changes i n the IR region for oriented Y-Ba-Cu-O thin films deposited on <110> surfac e of ZnSe single crystals, using differential IR spectroscopy Fourier techn ique in the spectral region between 100 cm(-1) and 450 cm(-1). We have also found the photoinduccd photodarkening effect under the influence of the CO 2 Pulse laser (lambda = 10.6 mum). The possibility of using the above-menti oned materials as promising materials for IR optoelectronics and nonlinear optics is discussed.