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Photorefraction Dependent on Composition in LiNbO 3 Crystals with and without MgO Doping
Author(s) -
Kan S.,
Sakamoto M.,
Okano Y.,
Yoon D. H.,
Fukuda T.,
Oguri O.,
Sasaki T.
Publication year - 1996
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.2170310314
Subject(s) - doping , stoichiometry , composition (language) , crystal (programming language) , materials science , photoconductivity , chemical composition , analytical chemistry (journal) , crystallography , mineralogy , chemistry , optoelectronics , organic chemistry , linguistics , philosophy , computer science , programming language
The photorefraction in LiNbO 3 single crystals dependent on the melt composition with and without MgO doping was investigated. It was found that 1 mol% MgO‐doped crystal with nearly stoichiometric composition has a strong photorefraction resistance. compared with a congruent composition. In an undoped crystal, the photorefraction was shown to be pronounced as incrcasing Li content of a melt from 48.6 to 58 mol% Li 2 O. These results were discussed from a viewpoint of the relationship between the photoconductivity and the concentration of cation‐site vacancies or Nb on Li‐site.