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30 September 1996 Anomalous photorefractive behaviors in doped KNSBN crystals
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Proceedings Volume 2896, Photorefractive Materials; (1996)
Event: Photonics China '96, 1996, Beijing, China
Anomalous photorefractive behaviors that cannot be explained by previous models are observed in doped KNSBN crystals. The space-charge field increases to its maximum value and then gradually decreases as the incident light intensity increases. The superlinear dependence of the response rate on intensity, i.e. (tau) -1 varies direct as Ix (x greater than 1), are obtained in a Co:KNSBN crystal. The nearly linear dependence of response rate on intensity is measured in heavy reduced Co:KNSBN crystal, in which the dark decay of space-charge field is much faster and the total amount of dark decay is also larger than another one. A new model of two types of carriers with two deep and two shallow traps is proposed to explain these results.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yanqiu Li, Dongsong Sun, Yan Li, Kebin Xu, and Fanglin Hou "Anomalous photorefractive behaviors in doped KNSBN crystals", Proc. SPIE 2896, Photorefractive Materials, (30 September 1996);

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