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首页> 外文期刊>Solid State Communications >Optical behaviour of VTE treated near stoichiornetric LiNbO3 crystals
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Optical behaviour of VTE treated near stoichiornetric LiNbO3 crystals

机译：VTE处理的接近化学计量的LiNbO3晶体的光学行为

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摘要

Near stoichiometric LiNbO3 crystal wafers of thickness up to 2 mm were prepared by vapour transport equilibration technique (VTE) at various process temperatures. Crystals were characterised by measurement of the UV absorption edge, refractive index, second harmonic generation (SHG) efficiency, and conoscopy pattern analysis. The comparison of VTE treated crystals show that the blue shift in cut off wavelength occurred with the increasing process temperature (i.e. increasing Li/Nb ratio). The refractive indices were found decreasing with increasing process temperature of VTE samples. The SHG efficiency increases in the range of 1.98-2.3 times for the VTE processed samples with respected to congruent crystals. Conoscopy pattern reveals the optical homogeneity of the VTE treated crystal. (c) 2005 Elsevier Ltd. All rights reserved.
机译：通过蒸汽传输平衡技术（VTE）在各种工艺温度下制备了厚度接近2 mm的接近化学计量的LiNbO3晶体晶片。晶体的特征是通过测量UV吸收边，折射率，二次谐波产生（SHG）效率和镜检模式分析。经VTE处理的晶体的比较表明，截止波长的蓝移随工艺温度升高（即Li / Nb比升高）而发生。发现折射率随着VTE样品的工艺温度升高而降低。对于VTE处理的样品，相对于全同晶体，SHG效率提高了1.98-2.3倍。镜检模式揭示了经VTE处理的晶体的光学均匀性。 （c）2005 Elsevier Ltd.保留所有权利。

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