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Proceedings Paper

Anomalous photorefractive behaviors in doped KNSBN crystals
Author(s): Yanqiu Li; Dongsong Sun; Yan Li; Kebin Xu; Fanglin Hou
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Paper 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 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.

Paper Details

Date Published: 30 September 1996
PDF: 10 pages
Proc. SPIE 2896, Photorefractive Materials, (30 September 1996); doi: 10.1117/12.253224
Show Author Affiliations
Yanqiu Li, Harbin Institute of Technology (China)
Dongsong Sun, Harbin Institute of Technology (China)
Yan Li, Harbin Institute of Technology (China)
Kebin Xu, Harbin Institute of Technology (China)
Fanglin Hou, Science and Technology Commission of Heilongjiang Province (China)


Published in SPIE Proceedings Vol. 2896:
Photorefractive Materials
Ratnakar R. Neurgaonkar; Tsutomu Shimura; Peixian Ye, Editor(s)

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