Study on UV-light-induced absorption in LiNbO3:Fe, Co crystal

doi:10.1088/1674-1056/19/8/084203

中国物理B ›› 2010, Vol. 19 ›› Issue (8): 84203-084203.doi: 10.1088/1674-1056/19/8/084203

Study on UV-light-induced absorption in LiNbO₃:Fe, Co crystal

陈洪建¹, 阎文博¹, 陈贵锋¹, 沈俊¹, 申绪男¹, 李养贤¹, 师丽红²

(1)School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China; (2)Tianjin Institute of Urban Construction, Tianjin 300384, China

收稿日期:2009-08-05 修回日期:2009-10-12 出版日期:2010-08-15 发布日期:2010-08-15
基金资助:
Project supported by the Natural Science Foundation of Hebei Province, China (Grant Nos. F2007000119 and F2009000108), the Natural Science Foundation of Tianjin, China (Grant No. 09JCYBJC02400), and the Scientific Research Foundation of Education Bureau of Hebei Province, China (Grant No. 2008113).

Study on UV-light-induced absorption in LiNbO₃:Fe, Co crystal

Chen Hong-Jian(陈洪建)^a), Shi Li-Hong(师丽红)^b), Yan Wen-Bo(阎文博)^a)†, Chen Gui-Feng(陈贵锋)^a), Shen Jun(沈俊)^a), Shen Xu-Nan(申绪男)^a), and Li Yang-Xian(李养贤)^a)

^a School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China; ^b Tianjin Institute of Urban Construction, Tianjin 300384, China

Received:2009-08-05 Revised:2009-10-12 Online:2010-08-15 Published:2010-08-15
Supported by:
Project supported by the Natural Science Foundation of Hebei Province, China (Grant Nos. F2007000119 and F2009000108), the Natural Science Foundation of Tianjin, China (Grant No. 09JCYBJC02400), and the Scientific Research Foundation of Education Bureau of Hebei Province, China (Grant No. 2008113).

摘要/Abstract

摘要： In this paper, the temporary UV-light-induced absorption in LiNbO₃:Fe, Co crystal is investigated for different UV intensities. It is found that the sensitizing process in LiNbO₃:Fe, Co can be considered as a combination of two sub-processes with different time constants. Based on the lattice structure and the photochromic mechanism of the material, the two sub-processes are suggested to arise from electron transfer from O^{2 -} to Fe^{3 +} through two paths with different distances. The two-colour recording experiment in LiNbO₃:Fe, Co is also preformed by using UV and green light as gating and writing beams respectively. High sensitivity is obtained in the recording, which is considered as the consequence of direct charge transfer from O^{2 -} to Fe^{3 +}.

Abstract: In this paper, the temporary UV-light-induced absorption in LiNbO₃:Fe, Co crystal is investigated for different UV intensities. It is found that the sensitizing process in LiNbO₃:Fe, Co can be considered as a combination of two sub-processes with different time constants. Based on the lattice structure and the photochromic mechanism of the material, the two sub-processes are suggested to arise from electron transfer from O^{2 -} to Fe^{3 +} through two paths with different distances. The two-colour recording experiment in LiNbO₃:Fe, Co is also preformed by using UV and green light as gating and writing beams respectively. High sensitivity is obtained in the recording, which is considered as the consequence of direct charge transfer from O^{2 -} to Fe^{3 +}.

Key words: lithium niobate, photochromic, charge transfer, photorefractive effect

中图分类号: (Other nonmetallic inorganics)

78.40.Ha

61.66.Fn (Inorganic compounds) 61.72.J- (Point defects and defect clusters) 61.72.S- (Impurities in crystals) 78.20.Jq (Electro-optical effects)

陈洪建, 师丽红, 阎文博, 陈贵锋, 沈俊, 申绪男, 李养贤. Study on UV-light-induced absorption in LiNbO₃:Fe, Co crystal[J]. 中国物理B, 2010, 19(8): 84203-084203.

Chen Hong-Jian(陈洪建), Shi Li-Hong(师丽红), Yan Wen-Bo(阎文博), Chen Gui-Feng(陈贵锋), Shen Jun(沈俊), Shen Xu-Nan(申绪男), and Li Yang-Xian(李养贤). Study on UV-light-induced absorption in LiNbO₃:Fe, Co crystal[J]. Chin. Phys. B, 2010, 19(8): 84203-084203.

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Study on UV-light-induced absorption in LiNbO₃:Fe, Co crystal

Study on UV-light-induced absorption in LiNbO₃:Fe, Co crystal

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