A spatial‑frequency patching metasurface enabling super‑capacity perfect vector vortex beams  

作　　者：Zhipeng Yu Xinyue Gao Jing Yao Zhiyuan Wang Tianting Zhong Yuzhi Shi Bo Li Puxiang Lai Xiangping Li Qinghua Song 

机构地区：[1]Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen,Guangdong,China [2]Department of Biomedical Engineering,Hong Kong Polytechnic University,Hong Kong SAR,China [3]Hong Kong Polytechnic University Shenzhen Research Institute,Shenzhen,Guangdong,China [4]Institute of Precision Optical Engineering,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China [5]Suzhou Laboratory,Suzhou 215000,China [6]Photonics Research Institute,Hong Kong Polytechnic University,Hong Kong SAR,China [7]Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications,Institute of Photonics Technology,Jinan University,Guangzhou 510632,China

出　　处：《eLight》2024年第1期14-25,共12页e光学(英文)

基　　金：support from the National Natural Science Foundation of China(No.12204264);the Jiangsu Provincial Fundamental Research Program(No.BK20243029);the Shenzhen Science and Technology Innovation Commission(No.JCYJ20230807111706014);support from the National Key R&D Program of China(2021YFB2802003);National Natural Science Foundation of China(NSFC)(62325503);support from the National Natural Science Foundation of China(81930048);the Guangdong Science and Technology Commission(2019BT02X105);Hong Kong Research Grant Council(15217721,C7074-21);the Hong Kong Polytechnic University(P0045680,P0043485,P0045762,P0049101);Y.S.acknowledges the National Key Research and Development Program of China(No.2023YFF0613600);the Shanghai Pilot Program for Basic Research,National Natural Science Foundation of China(No.62205246);Science and Technology Commission of Shanghai Municipality(No.22ZR1432400).

摘　　要：Optical vortices,featured with an infinite number of orthogonal channels of orbital angular momentum,have demonstrated marvelous potentials in optical multiplexing and associated applications.However,conventional vortex beams with global phase modulation approach usually possess a single topological charge(TC)and a uniform radial distance with the donut-shaped intensity,leaving unlimited spatial intensity information unexplored.Here,to break the spatial capacity limitation,we introduce an entirely new concept of a spatial-frequency patching metasurface by patching the field distribution piece-by-piece in the spatial-frequency domain,thereby breaking the symmetry of the beam morphology and allowing for local manipulation of spatial intensity and TC distributions.Moreover,by superimposing two orthogonal circular polarized perfect VBs,our breakthrough offers a super-capacity with at least 13 channels across a 3D parametric space,including morphology,polarization azimuth and ellipticity angle,namely super-capacity perfect vector vortex beams(SC-PVVBs).Furthermore,we have designed an optimized Dammann grating to facilitate an array of SC-PVVBs,thereby unleashing the full potentials across 13 channels/bits for multi-dimensional complex information communications.Our findings promise dense data transmission in an ultra-secure manner using VBs,opening up new avenues in super-capacity optical information technology in an integrated metasurface platform.

关 键 词：VORTEX PERFECT thereby 

分 类 号：O43[机械工程—光学工程]