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High photorefractive sensitivity and fast response time of near‐stoichiometric and MgO doped LiNbO 3 :Fe crystals
Author(s) -
Chen Shaolin,
Liu Hongde,
Kong Yongfa,
Huang Ziheng,
Xu Jingjun
Publication year - 2006
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200510670
Subject(s) - stoichiometry , photorefractive effect , dopant , doping , materials science , lithium niobate , crystal (programming language) , ion , analytical chemistry (journal) , crystal growth , inorganic chemistry , chemistry , crystallography , optoelectronics , chromatography , organic chemistry , computer science , programming language
Congruent LiNbO 3 :Fe and LiNbO 3 :Mg,Fe crystals were grown by Czochralski method, and vapor transport equilibration technique was employed to improve the [Li]/[Nb] ratios of these crystals. The influence of stoichiometry and MgO dopant on the photorefractive sensitivity and response time of LiNbO 3 :Fe crystals was investigated. Both stoichiometry and MgO dopant can effectively reduce the amount of intrinsic defects, but MgO can also decrease the concentration of Fe 2+ ions in Li‐sites. Near‐stoichiometric and MgO doped LiNbO 3 :Fe crystal has high photorefractive sensitivity and fast response time. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)