Binary encoding-inspired generation of vector vortex beams

作     者：Hui Li Chenglong Zheng Jingyu Liu Hang Xu Chunyu Song Fan Yang Jitao Li Zhen Yue Wei Shi Yating Zhang Yan Zhang Jianquan Yao 

作者机构：Key Laboratory of Opto-Electronics Information Technology(Tianjin University)Ministry of EducationSchool of Precision Instruments and Opto-Electronics EngineeringTianjin UniversityTianjin 300072China Beijing Key Laboratory for Metamaterials and DevicesKey Laboratory of Terahertz OptoelectronicsMinistry of EducationBeijing Advanced Innovation Center for Imaging TechnologyDepartment of PhysicsCapital Normal UniversityBeijing 100048China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2023年第66卷第5期

页      面：139-154页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：supported by the National Key Research and Development Program of China(Grant Nos.2021YFB2800703,and 2017YFA0700202) the National Natural Science Foundation of China(Grant Nos.61675147,61975146,62075159,62105240,and 91838301) 

主　　题：metasurfaces vector beams spin-orbit interactions polarization optics 

摘      要：Vortex and vector terahertz(THz)beams with inhomogeneous polarization states have become a considerable hot topic in the last decade due to their important roles in multiplexed wireless data ***,the technical instruments to form and evaluate such beams are rather limited,as they are mainly collected in the visible *** emergence of coded metasurfaces has reinvigorated the design of functional devices with multiple degrees of ***,we demonstrate a versatile design inspired by a binary encoding approach for generating off-axis vectorial THz beams on all-silicon ***,simultaneous manipulation of the encoding method within the orthogonal circularly polarized(CP)channel provides strong support for developing versatility in vector THz beams,including the generation of arbitrary polarization profiles and the directional emission of multiplexed vector vortex beams(VVBs)with specified polarization *** introduction of the latitudinal polarization control factor guarantees that continuously rotating or independently designed vector polarization profiles can be obtained on a pre-defined focal ***,a universal parametric theoretical model is developed to analyze the evolutionary trend of off-axis VVB in ***,the proposed monolayer vector metasurface bypasses the requirement of multiple cascaded optical elements,further inducing the advancement of ultra-thin vector THz sources,and also facilitating the generation of vector fields with tailored polarization distributions in 3D space.