Anomalous photorefractive behaviors in doped KNSBN crystals

Yanqiu Li; Dongsong Sun; Yan Li; Kebin Xu; Fanglin Hou

doi:10.1117/12.253224

30 September 1996 Anomalous photorefractive behaviors in doped KNSBN crystals

Yanqiu Li, Dongsong Sun, Yan Li, Kebin Xu, Fanglin Hou

Proceedings Volume 2896, Photorefractive Materials; (1996) https://doi.org/10.1117/12.253224
Event: Photonics China '96, 1996, Beijing, China

Abstract

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 I^x (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.

Citation Download Citation

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); https://doi.org/10.1117/12.253224

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