基于ATR技术的有机聚合物二次电光系数的测量  

Measurement of the Quadratic Electro-optic Coefficient of Organic Polymer Based on Attenuated-total-reflection Technique

作　　者：朱琨[1] 邓晓旭[1] 曹庄琪[1] 沈启舜[1] 韦玮[2] 张志坚[2] 谢世祥[2] 

机构地区：[1]上海交通大学物理系,上海200240 [2]复旦大学先进材料实验室,上海200433

出　　处：《光电工程》2008年第1期76-79,共4页Opto-Electronic Engineering

基　　金：中国国家自然科学基金资助项目(60544010、60237010、60544001)

摘　　要：二次电光效应是有机聚合物材料一种重要的电光特性,利用这种特性可以制备有机聚合物电光调制器等电光器件。有机聚合物材料的二次电光系数是衡量其二次电光效应的一个重要参数,其可以用一个6×6阶的张量来表示。利用该张量的对称特性、各个元素之间的已知关系以及折射率椭球公式,本文提出了一种基于衰减全反射(ATR)技术的测量有机聚合物二次电光系数的方法。在测量中,通过选用TM偏振光以及TE偏振光作为测量光束,可以分别获得二次电光系数张量中S11以及S12元素。利用已知关系,可以计算得到S44以及直流克尔系数。从而得到二电光系数张量中所有元素的值。The Quadratic Electro-optic （QEO） coefficient is a very important parameter in the evaluation of the QEO effect of the organic polymer, which could be expressed as a 6×6 tensor. By the utilization of the symmetric characteristic of the tensor, algebra relation between the elements in the tensor and refraction index ellipsoid equation, an approach base on Attenuated-total-reflection （ATR） technology was proposed for the measurement of the QEO coefficient of the organic polymer. In the measurement, elements S11 and S22 in the tensor could be obtained by choosing TM mode and TE mode respectively as the polarization mode of the incident light beam. Then, S44 and DC Kerr Coefficient could be calculated using the known algebra relation equation. Consequently, the value of all elements in the QEO coefficient tensor is obtained.

关 键 词：导波光学 导波光电子器件 衰减全反射 二次电光系数 直流克尔系数 

分 类 号：TP211.6[自动化与计算机技术—检测技术与自动化装置]