用于研究三阶非线性极化率分量的修正椭圆偏振光Z扫描方法。

Modified elliptically polarized light Z-scan method for studying third-order nonlinear susceptibility components.

作者信息

Yan Xiao-Qing, Liu Zhi-Bo, Zhang Xiao-Liang, Zang Wei-Ping, Tian Jian-Guo

机构信息

The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics School, Nankai University, Tianjin 300457, China.

出版信息

Opt Express. 2010 May 10;18(10):10270-81. doi: 10.1364/OE.18.010270.

DOI:10.1364/OE.18.010270

PMID:20588880

Abstract

The normal elliptically polarized light Z-scan method is modified by adding a quarter-wave plate and an analyzer before the detector. The normalized transmittance formulas of modified elliptically polarized light Z-scan are obtained for media with negligible nonlinear absorption. Compared with normal linearly and elliptically polarized light Z-scan methods, an increase of sensitivity by a factor of larger than 4 is achieved for the real part of third-order susceptibility component's measurements using this modified elliptically polarized light Z-scan method. The analytical results are verified by studying the real part of independent susceptibility components of CS(2) liquid. Moreover, the potential application for cross-polarized wave generation is discussed.

摘要

通过在探测器前添加一个四分之一波片和一个检偏器，对常规椭圆偏振光Z扫描方法进行了改进。对于非线性吸收可忽略不计的介质，得到了改进后的椭圆偏振光Z扫描的归一化透过率公式。与常规线偏振光和椭圆偏振光Z扫描方法相比，使用这种改进后的椭圆偏振光Z扫描方法测量三阶极化率分量的实部时，灵敏度提高了4倍以上。通过研究CS(2)液体独立极化率分量的实部，验证了分析结果。此外，还讨论了其在交叉极化波产生方面的潜在应用。