The two photorefractive centres in iron doped nearly stoichiometric lithium niobate crystals  

作　　者：李晓春 孔勇发 王利忠 刘宏德 

机构地区：[1]Department of Physics,College of Science,Taiyuan University of Technology [2]The Key Laboratory of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials,Ministry of Education,Nankai University

出　　处：《Chinese Physics B》2008年第3期1014-1019,共6页中国物理B（英文版）

基　　金：Project supported by the research funding via Program for Changjiang Scholars of China;Innovative Research Team in University,China;the National Natural Science Foundation of China(Grant No60578019);Program for Changjiang Scholars and Innovative Research Team in University

摘　　要：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.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.

关 键 词：lithium niobate crystal photorefractive effect STOICHIOMETRIC 

分 类 号：O614.111[理学—无机化学]