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The paper presents results of investigations of optical absorption spatial changes in congruent bulk LiNbO3 crystals in 300–800 nm spectral region along Х, Y, Z directions caused by high-temperature (400–700 оС) annealing in Н2 and, subsequently, in air. As it is shown, the coloration/discoloration processes are anisotropic: a maximal depth of coloration is observed for Z direction and a minimal one...
Thin films of chemical composition Ge 20 Se 80 and Ag 6 (Ge 0.20 Se 0.80 ) 94 are prepared by thermal evaporation technique. The optical properties of these thin films are determined by a method, based only on the transmission spectra at normal incidence, measured over the 400–2000nm spectral range. This useful optical method takes into consideration...
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