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作 者:Lin Zhu Yiheng Zhang Shijun Ge Peng Chen Yanqing Lu 朱琳;张逸恒;葛士军;陈鹏;陆延青(National Laboratory of Solid State Microstructures,Key Laboratory of Intelligent Optical Sensing and Manipulation,College of Engineering and Applied Sciences,and Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China)
出 处:《Chinese Optics Letters》2024年第6期158-163,共6页中国光学快报(英文版)
基 金:supported by the National Key R&D Program of China (No.2021YFA1202000);the National Natural Science Foundation of China (NSFC) (Nos.62222507,62175101,and 12004175);the Natural Science Foundation of Jiangsu Province (No.BK20212004)。
摘 要:Cholesteric liquid crystal (CLC) has been widely used in flat optical elements due to the Pancharatnam–Berry(PB) phase modulation. In order to achieve PB phase modulation for both circular polarizations, it is natural to come up with stacking CLCs with opposite chirality. Here, various optical properties of diverse CLC stacking structures are systematically investigated by numerical calculations. With the thickness of the CLC sublayers becoming smaller, the reflection bandgap splits into three main parts, and the rotatory dispersion gradually becomes negligible. Vector beams provide a more intuitive verification. These results provide theoretical guidance for future studies on stacked chiral anisotropic media.
关 键 词:cholesteric liquid crystals Pancharatnam–Berry phases CHIRALITY vector beams
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