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

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

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 +}.

Keywords: lithium niobate photochromic charge transfer photorefractive effect

Received: 05 August 2009
Revised: 12 October 2009
Accepted manuscript online:

PACS:	78.40.Ha	(Other nonmetallic inorganics)
	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)

Fund: 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).

Cite this article:

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 2010 Chin. Phys. B 19 084203

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

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