Characterization of the KNSBN: Cu crystal with two-wave coupling at visible and infrared wavelengths期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Characterization of the KNSBN: Cu crystal with two-wave coupling at visible and infrared wavelengths

Authors:	H. Zhang B. Guo H. Jiang Y. Shih L. Yan

Affiliation:	(1) Department of Physics, University of Maryland, 21228 Baltimore, MD, USA;(2) Department of Electrical Engineering, University of Maryland, 21228 Baltimore, MD, USA

Abstract:	We have optically characterized the newly-developed photorefractive crystal KNSBN: Cu by two-wave coupling at visible and near-infrared wavelengths. The effective electrooptic coefficients(k_g)r₁₃ and(k_g)r₃₃, the effective charge carrier densityN_eff, the dark conductivity_d, the product of mobility and electron-trap recombination time_R, the formation and decay rate of index grating and the absorption coefficient of the crystal were determined from visible to near-infrared wavelengths. Their wavelength dependences were also studied. It is interesting to notice that the KNSBN: Cu crystal has a very largeN_eff and large gain coefficient for ordinary ray (o-ray) in the visible region, and the photorefractive properties of the crystal are very different in the visible and near-infrared spectral regions.

Keywords:	42.70.Gz 42.30.Va 42.40.Kw 42.65
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