<title>Two-beam coupling in sillenite crystals</title>

Temperature-dependent optical absorption and its photoinduced changes in Bi12 TiO20?Ca? crystals

“…Bismuth titanate, Bi 12 TiO 20 , crystals offer the advantages of low optical rotation and high photosensitivity in the visible and near-IR spectral regions [1,7]. Optical absorption has a significant effect on the performance of photorefractive devices, and its temperature variation determines the temperature range of their normal operation.…”

“…Yet another salient feature of bismuth titanate is the significant photoinduced absorption in the visible range [2,[8][9][10][11][12][13][14][15], which is believed to result from photoinduced charge transfer between defect centers with different photoionization cross sections [8][9][10][11][12][13][14]. The concentration of such centers, the probabilities of the photoexcitation and thermal generation of nonequilibrium charge carriers and intracenter transitions, and recombination coefficients govern the dynamics and magnitude of photoinduced absorption [15] and may depend on temperature.…”

Hologram recording and reading in cubic gyrotropic photorefractive piezocrystals (review)

“…The technology for growing pure and doped sillenite crystals was reported [64]. Also, results of applying a model of the photorefractive effect with shallow and deep traps [65][66][67][68][69][70][71] for interpreting experimental results from a study of two-wave mixing were given.…”

“…Also, results of applying a model of the photorefractive effect with shallow and deep traps [65][66][67][68][69][70][71] for interpreting experimental results from a study of two-wave mixing were given. This model was used [72] with light-induced absorption incorporated additionally into the examination. It should be noted that the dynamics of photo-induced light absorption in bismuth titanate has been the subject of many publications, which have been reviewed in a monograph [7].…”