Abstract
A photorefractive Bi12TiO20 (BTO) crystal is exposed with high intensity pulsed-laser beams 532 nm (the average intensity of the laser was 110 mW/cm2, the average intensity per pulse was 2 MW/cm2), and the photo-induced dynamics of the absorption between 480 and 900 nm are studied and explained by two long-lived energy levels in the forbidden band. The relaxation times of the long-lived energy levels are experimentally found to be 104 and 105 s. The hysteresis character of the absorption coefficient is discussed.
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42.70.Mp; 42.70.Gi
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Matusevich, A., Tolstik, A., Kisteneva, M. et al. Investigation of photo-induced absorption in a Bi12TiO20 crystal. Appl. Phys. B 92, 219–224 (2008). https://doi.org/10.1007/s00340-008-3098-z
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DOI: https://doi.org/10.1007/s00340-008-3098-z