激光技术, 2019, 43 (4): 442, 网络出版: 2019-07-10   

大孔径液晶q波片的制备及性能研究

Preparation and characteristics of large aperture liquid crystal q-wave-plates
作者单位
南开大学 泰达应用物理研究院和物理科学学院, 天津 300457
摘要
为了解决液晶q波片制备过程中重复性差、方法繁琐、孔径限制的问题, 采用了一种基于紫外掩模曝光法和液晶面外区域定向技术的液晶q波片制备方法, 进行了理论分析和实验验证。搭建了紫外曝光系统, 制备了直径为2.54cm, q=1,夹角α0=0的大孔径液晶q波片。结果表明, 紫外掩模法构建的大孔径液晶q波片的自旋角动量-轨道角动量的转换效率可达到85%; 利用该波片实现了涡旋光、矢量涡旋光的产生和转换。基于紫外掩模法构建大孔径液晶q波片的方法具有成本低廉、制备工艺简单、速度快等优点, 可实现液晶q波片的批量化制作, 有利于液晶q波片走向商业化。
Abstract
In order to solve the problems of poor repeatability, cumbersome methods and aperture limitation in the preparation of liquid crystal q-wave-plates, a preparation method of liquid crystal q-wave-plates was adopted based on ultraviolet mask exposure and liquid crystal out-of-plane orientation technology. Theoretical analysis and experimental verification were carried out. The ultraviolet exposure system was built. Large aperture liquid crystal q-wave-plates were prepared with diameter of 2.54cm, topological charges q of 1 and initial angle of 0.The results show that the conversion efficiency of spin angular momentum to orbital angular momentum of the large aperture liquid crystal q-wave-plates constructed by ultraviolet mask method can reach 85%. By using the wave plate, the generation and conversion of vortices and vector vortices are realized. The method of constructing large aperture liquid crystal q-wave-plates based on ultraviolet mask has advantages of low cost, simple preparation process and fast speed. It can realize batch fabrication of liquid crystal q-wave-plates. It is conducive to the commercialization of liquid crystal q-wave-plates.

张玉娇, 高少华, 宋筱, 禹宣伊, 王佳艺, 张心正. 大孔径液晶q波片的制备及性能研究[J]. 激光技术, 2019, 43(4): 442. ZHANG Yujiao, GAO Shaohua, SONG Xiao, YU Xuanyi, WANG Jiayi, ZHANG Xinzheng. Preparation and characteristics of large aperture liquid crystal q-wave-plates[J]. Laser Technology, 2019, 43(4): 442.

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