利用单一波片将椭圆偏振光转换为线/圆偏振光  

Parameter selections for converting elliptically polarized light into linearly/circularly polarized light with a single-wave plate

作　　者：林珊[1] 杨庆鑫[1] 李俊庆[1] 张宇[1] 于翠玲[1] 唐勐[1] LIN Shan;YANG Qingxin;LI Junqing;ZHANG Yu;YU Cuiling;TANG Meng(School of Physics,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学物理学院,黑龙江哈尔滨150001

出　　处：《物理实验》2023年第7期13-20,共8页Physics Experimentation

基　　金：黑龙江省教育厅高等教育本科教学改革研究项目(No.SJGY20220035);哈尔滨工业大学教学发展基金项目(No.XSZ20210070)。

摘　　要：基于琼斯矩阵,推导了利用单一波片将右旋椭圆偏振光转换为线偏振光的条件,即该波长下波片的等效相位延迟满足δ′∈[2β,π-2β],同时可以计算得到波片快轴(或者出射线偏振光偏振方向)与入射椭圆偏振光长轴的夹角.另外,给出了右旋椭圆偏振光转换为右旋圆偏振光的条件为:选择等效相位延迟δ′=π/2-2β的波片,且按其快(慢)轴与入射椭圆偏振光长轴的夹角为±π/4的位置摆放.依据文中的参量范围,可以快速判定现有波片是否能实现偏振态的转换.Based on Jones matrix,the conditions of converting right-handed elliptically polarized light into linearly polarized light by using a single wave plate were derived:the equivalent phase delayδ′of the wave plate at this wavelength must satisfyδ′∈[2β,π-2β].Furthermore,the angle between the fast axis of the wave plate(or polarization direction of outgoing polarized light)and the long axis of the incident elliptically polarized light was calculated.In addition,the conditions for outgoing right-handed circularly polarized light were also given:only the wave plate with equivalent phase delayδ′=π[]2-2βcould be selected,and its optical axis was placed at±π[]4 with the long axis of the incident elliptically polarized light.According to the parameters in this paper,the reader could quickly determine whether the existing wave plate could realize the conversion of polarization state.

关 键 词：琼斯矩阵 椭圆偏振光 线偏振光 1/4波片 

分 类 号：O436.3[机械工程—光学工程]