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

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【作者】 陈洪建； 师丽红； 阎文博； 陈贵锋； 沈俊； 申绪男； 李养贤；

【Author】 Chen Hong-Jian,Shi Li-Hong~(b)),Yan Wen-Bo~(a)+), Chen Gui-Feng~(a)) Shen Jun~(a)), Shen Xu-Nan~(a)),and Li Yang-Xian~(a)) a)School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China b)Tianjin Institute of Urban Construction,Tianjin 300384,China

【机构】 School of Materials Science and Engineering,Hebei University of Technology； Tianjin Institute of Urban Construction；

【摘要】 <正>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 O2- to Fe3+ 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 O2- to Fe3+.

【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 O2- to Fe3+ 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 O2- to Fe3+.

【关键词】 lithium niobate； photochromic； charge transfer； photorefractive effect；
【Key words】 lithium niobate； photochromic； charge transfer； photorefractive effect；
【基金】 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);the Scientific Research Foundation of Education Bureau of Hebei Province,China(Grant No.2008113)
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2010年08期
  • 【分类号】O436.2
  • 【被引频次】4
  • 【下载频次】20
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