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Broadband high-efficiency polymerized liquid crystal metasurfaces with spin-multiplexed functionalities in the visible

查看全文 作　　者：XINJIAN [1,2]LU;XIAOYIN [1,3]LI;YINGHUI [1,2,3]GUO;MINGBO [1,2,3]PU;JIANGYU [1,4]WANG;YAXIN [1,2]ZHANG;XIONG [1,2]LI;XIAOLIANG [1,2]MA;XIANGANG [1,2]LUO 高影响力作者 机构地区：[1]State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering,Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;[2]School of Optoelectronics,University of Chinese Academy of Sciences,Beijing 100049,China;[3]Vector Light Field Research Center,Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;[4]School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China高影响力机构 出　　处：《Photonics Research》索引2022年第10卷第6期,共14页高影响力期刊 基　　金：National Key Research and Development Program of China(SQ2021YFA1400121);National Natural Science Foundation of China(61875253,61975210,U20A20217);Youth Innovation Promotion Association of the Chinese Academy of Sciences(2019371)。 摘　　要：Traditional optical components are usually designed for a single functionality and narrow operation band,leading to the limited practical applications.To date,it is still quite challenging to efficiently achieve multifunctional performances within broadband operating bandwidth via a single planar optical element.Here,a broadband high-efficiency polarization-multiplexing method based on a geometric phase polymerized liquid crystal metasurface is proposed to yield the polarization-switchable functionalities in the visible.As proofs of the concept,two broadband high-efficiency polymerized liquid crystal metalenses are designed to obtain the spin-controlled behavior from diffraction-limited focusing to sub-diffraction focusing or focusing vortex beams.The experimental results within a broadband range indicate the stable and excellent optical performance of the planar liquid crystal metalenses.In addition,low-cost polymerized liquid crystal metasurfaces possess unique superiority in large-scale patterning due to the straightforward processing technique rather than the point-by-point nanopatterning method with high cost and low throughput.The high-efficiency liquid crystal metasurfaces also have unrivalled advantages benefiting from the characteristic with low waveguide absorption.The proposed strategy paves the way toward multifunctional and high-integrity optical systems,showing great potential in mobile devices,optical imaging,robotics,chiral materials,and optical interconnections. 关 键 词：polarization INTERCONNECTION WAVEGUIDE
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