Journal
JOURNAL OF APPLIED PHYSICS
Volume 90, Issue 3, Pages 1516-1520Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1384489
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The photorefractive properties of nominally pure near-stoichiometric LiNbO3 crystals grown from congruent melts containing 11 mol % K2O are studied, and some photorefractive properties which are very different from those in congruent LiNbO3 crystals are observed. Large stationary energy transfer (Gamma (max)=25 cm(-1)) exists in near-stoichiometric crystals though the photovoltaic field is dominant. The light-induced scattering fanning is markedly asymmetric in the crystals, which is very different from the symmetric fanning observed in congruent ones. Our analysis shows that these differences are caused by the large photovoltaic field and the relatively small density of filled traps in as-grown near-stoichiometric LiNbO3. (C) 2001 American Institute of Physics.
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