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Structure and optical properties of near stoichiometric Ce:LiNbO 3 crystals
Author(s) -
Fan Yexia,
Li Hongtao,
Zhao Liangcheng
Publication year - 2007
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.200610854
Subject(s) - stoichiometry , photorefractive effect , doping , photoconductivity , analytical chemistry (journal) , absorption (acoustics) , ion , diffraction , absorption spectroscopy , chemistry , materials science , crystallography , optics , optoelectronics , physics , organic chemistry , chromatography , composite material
The near sotichiometric Ce:LiNbO 3 (Ce:SLN) crystals were grown by the top seeded solution growth (TSSG) method by adding K 2 O flux to Li 2 O‐Nb 2 O 5 melt. Their UV‐vis absorption spectra and IR spectra were measured and discussed to investigate their defect structure. The results showed that the grown crystals were near stoichiometric and Ce ions in the crystals located the Li site. Photorefractive properties of Ce:SLN crystals were studied by two‐wave coupling experiment. The results of the two‐wave coupling experiments of the crystals showed that as the CeO 2 doping concentrations increased, the diffraction efficiency increased, photoconductivity decreased and the writing time and erasure time increased. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)