The two photorefractive centres in iron doped nearly stoichiometric lithium niobate crystals
Li Xiao-Chun(李晓春)a)b), Kong Yong-Fa(孔勇发)b)†,Wang Li-Zhong(王利忠)b) and Liu Hong-De(刘宏德)b)
a Department of Physics, College of Science, Taiyuan University of Technology, Taiyuan 030024, China;b The Key Laboratory of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials, Ministry of Education, Nankai University, Tianjin 300457, China
Abstract This paper investigates the photorefractive properties of iron doped lithium niobate with different [Li]/[Nb] ratios. The experimental results show two photorefractive centres for iron doped near-stoichiometric lithium niobate crystal. Besides Fe$^{2 + }$ and Fe$^{3 + }$ ions, small polarons and bipolarons are considered as another photoactive centre.
Received: 14 June 2007
Revised: 03 July 2007
Accepted manuscript online:
PACS:
42.65.Hw
(Phase conjugation; photorefractive and Kerr effects)
(Optical properties of bulk materials and thin films)
Fund: Project supported by the research
funding via Program for Changjiang Scholars of China and Innovative
Research Team in University, China and the National Natural Science
Foundation of China (Grant No 60578019) and Program for Changjiang
Scholars and Innovative Research Team in University.
Cite this article:
Li Xiao-Chun(李晓春), Kong Yong-Fa(孔勇发), Wang Li-Zhong(王利忠) and Liu Hong-De(刘宏德) The two photorefractive centres in iron doped nearly stoichiometric lithium niobate crystals 2008 Chin. Phys. B 17 1014
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