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Nanosecond optical response to pulsed uv excitation in KNbO3
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Interband photoexcitation in photorefractive ABO3 perovskites has only recently attracted the attention of researchers. Band to band excitation of electrons can lead to fast photorefractive response times [1] and, through trapping, to the sensitisation of impurity levels in the band gap. Strong effects are observed that lead to cw photorefractive response times on the microsecond time scale [1]. Absorption changes at visible wavelengths induced by uv illumination have been observed in BaTiO3 [2].
Optica Publishing Group
Title: Nanosecond optical response to pulsed uv excitation in KNbO3
Description:
Interband photoexcitation in photorefractive ABO3 perovskites has only recently attracted the attention of researchers.
Band to band excitation of electrons can lead to fast photorefractive response times [1] and, through trapping, to the sensitisation of impurity levels in the band gap.
Strong effects are observed that lead to cw photorefractive response times on the microsecond time scale [1].
Absorption changes at visible wavelengths induced by uv illumination have been observed in BaTiO3 [2].
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