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Picosecond photoinduced absorption in BaTiO(3) has been observed for the first time to our knowledge using picosecond laser pulses and a time delay pump-probe technique. The pump intensity dependence as well as the delay time dependence of the photoinduced absorption coefficient have been measured. The results can be explained qualitatively by a secondary-center model. From our results, the hole recombination time with secondary centers is not larger than 60 ps.
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Ye et al. (1991) studied this question.
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