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Proceedings Paper

Influence of the Li/Nb ratio on crystal growth and photorefractive properties of Ce:Mn:LiNbO3 crystal
Author(s): Wei Zheng; Bo Liu; Jiancong Bi; Yuheng Xu
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Paper Abstract

Ce:Mn:LiNbO3 crystals with different Li/Nb mole ratios in the melts (Li/Nb = 0.94, 1.05, 1.20, 1.38) have been grown for the first time. The growing conditions varied greatly on the Li/Nb ratio. With the increase of Li/Nb ratio in crystals, the Curie temperature raises while the melting point drops. The infrared spectra of crystals were measured. The exponential gain coefficient, response time and diffraction efficiency were measured by two wave coupling experiments with He-Ne laser (632.8nm). The near-stoichiometric Ce:Mn:LiNbO3 crystal grown from the melt with Li/Nb ratio 1.38 exhibits the largest exponential gain coefficient (33cm-1) and shortest response time (19s), which is attributed to its larger photoconduction. Combined with spectrum analysis we deduced that the increase of photoconduction may be due to the decrease of anti-site (NbLi)4+in crystals.

Paper Details

Date Published: 20 January 2005
PDF: 5 pages
Proc. SPIE 5633, Advanced Materials and Devices for Sensing and Imaging II, (20 January 2005); doi: 10.1117/12.574888
Show Author Affiliations
Wei Zheng, College of Material Science and Engineering (China)
Harbin Institute of Technology (China)
Bo Liu, Harbin Univ. of Science and Technology (China)
Jiancong Bi, Harbin Univ. of Science and Technology (China)
Yuheng Xu, Harbin Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 5633:
Advanced Materials and Devices for Sensing and Imaging II
Anbo Wang; Yimo Zhang; Yukihiro Ishii, Editor(s)

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