The dielectric behaviour of doped near-stoichiometric lithium niobate in the terahertz range

被引：0
|
作者：
吴亮 [1 ]
凌福日 [1 ]
左志高 [1 ]
刘劲松 [1 ]
姚建铨 [1 ,2 ]
机构：
[1] Wuhan National Laboratory for Optoelectronics,School of Optoelectronic Science and Engineering,Huazhong University of Science and Technology
[2] College of Precision Instrument and Optoelectronics Engineering,Tianjin University
来源：
Chinese Physics B | 2012年 / 01期
基金：
中国国家自然科学基金;
关键词：
near-stoichiometric LiNbO3; terahertz; photorefraction; domain reversal;
D O I：
暂无
中图分类号：
O614.111 [锂Li];
学科分类号：
070301 ; 081704 ;
摘要：
The dielectric properties of near-stoichiometric LiNbO 3:Fe and LiNbO;:Ce single crystals have been investigated using terahertz time domain spectroscopy in a frequency range of 0.7-1.6 THz at room temperature.When coupled with an applied external optical field,obvious photorefractive effects were observed,resulting in a modulation of the complex dielectric constant for the crystals.The variation in refractive index,| n|,had a linear relationship with the applied light intensity,accompanied by a step-like decrease at high intensity.The findings were attributed to the internal space charge field of the photorefraction and the light-induced domain reversal in the crystals.
引用
收藏
页码：476 / 481
页数：6
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