Light-induced absorption in a Bi₁₂TiO₂₀crystal

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

“…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.…”

Photoinduced absorption study of carrier dynamics in Ru-doped Bi12SiO20 crystals after nanosecond laser pulse excitation

“…For instance, Jones and Solymar 32 observed dark decay processes consisting of a rapid initial decay ͑attributed to the filling of shallow traps below the CB͒ followed by a slower "coasting" decay ͑associated with the recombination of charges to the deep traps͒. 6,[8][9][10][11][12] The situation in Ru-doped BSO can be expected to be even more complicated due to the interaction of several Ru-related centers in different valence states of the Ru-ion. Despite the known presence of more than one shallow trap, most models consider the existence of only one shallow trap for simplicity.…”

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

“…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.…”