旋转检偏技术的理论分析及其在电光效应实验中应用  

Theoretical Analysis of Rotating Polarization-Analyzer for Polarized Light and Its Application in Photoelectric Effect Experiment

作　　者：刘当波 宁长春[3] 高海翔[1] 高轶凡 顾春明 

机构地区：[1]上海交通大学物理与天文学院天文系,上海 [2]上海交通大学上海粒子物理和宇宙学重点实验室,上海 [3]西藏大学理学院物理系,西藏拉萨

出　　处：《现代物理》2018年第1期8-17,共10页Modern Physics

基　　金：国家自然科学基金(U1631101,11665022,11233006);上海市自然科学基金(16ZR1417200).

摘　　要：在偏振光实验中,测得出射偏振光强与偏振片旋转角的关系曲线为闭合8字型。本文提出了一种新型的旋转检偏技术,对旋转检偏技术给出理论分析和计算,并应用于电光效应实验中。在电光效应实验中,出射光的偏振特性与施加于电光晶体的电压,晶体与偏振片的摆放位置有关。在实验中采用BBO电光晶体,半波电压约1200 V,实验结果和理论分析吻合,并且从实验结果定出未知晶体的光轴的取向。We developed innovative polarization analyzer and used it in the photoelectric effect experiment. We give a detailed analysis of innovative rotating polarization analyzer, and calculate the distribution curves of the emergent intensity of emitting light. The analyzer was rotated by a mini-motor and polarization beam was returned to electric signal then to a computer by a photoelectric behind it. A BBO crystal was used and its 1/4 wave voltage is about 1200 V. The experimental and simulated results are in good agreement with each other and show that this method is effective. A key point is that we can determine the orientation of the light axis of a crystal.

关 键 词：偏振光 马吕斯定律 偏振光干涉 8字型偏振光图像 

分 类 号：O4[理学—物理]