Photorefractive properties of near-stoichiometric LiNbO3 grown from congruent melts containing K2O

Autor:	Xiaojun Chen, Zhong-Kang Wu, Shihong Pan, Jingjun Xu, Bing Li, Dengsong Zhu
Rok vydání:	2001
Předmět:	Materials science Field (physics) business.industry Scattering Energy transfer General Physics and Astronomy Photorefractive effect Light scattering symbols.namesake Optics Chemical physics symbols Phase conjugation business Raman scattering Stoichiometry
Zdroj:	Journal of Applied Physics. 90:1516-1520
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1384489
Popis:	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 (Γmax=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.
Databáze:	OpenAIRE
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