Digital coding transmissive metasurface for multi-OAM-beam

作     者：Si Jia Li Zhuo Yue Li Guo Shai Huang Xiao Bin Liu Rui Qi Li Xiang Yu Cao Si Jia Li;Zhuo Yue Li;Guo Shai Huang;Xiao Bin Liu;Rui Qi Li;Xiang Yu Cao

作者机构：Information and Navigation CollegeAir Force Engineering UniversityXi’an 710077China State Key Laboratory of Millimeter WavesSchool of Information Science and EngineeringSoutheast UniversityNanjing 210096China Shaanxi Key Laboratory of Artificially-Structured Functional Materials and DevicesAir Force Engineering UniversityXi'an 710051China 

出 版 物：《Frontiers of physics》 (物理学前沿（英文版）)

年 卷 期：2022年第17卷第6期

页      面：193-202页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.62171460 and 61801508) the Natural Science Basic Research Program of Shaanxi Province,China(Grant Nos.2020JM-350,20200108,and 20210110) the Young Innovation Team at Colleges of Shaanxi Province,China(Grant No.2020022) the Postdoctoral Innovative Talents Support Program of China(Grant No.BX20180375) China Postdoctoral Science Foundation(Grant Nos.2021T140111,2019M650098,and 2019M653960) the Postdoctoral Research Funding of Jiangsu Province(No.2019K219) 

主　　题：transmissive metasurface orbital angular momentum Pancharatnam-Berry phase multi-beam phase compensation 

摘      要：Orbital angular momentum(OAM)is a phenomenon of vortex phase distribution in free space,which has attracted enormous attention in theoretical research and practical application of wireless communication systems due to its characteristic of infinitely orthogonal ***,traditional methods generating OAM beams are bound to complex structure,large device,multiple layers,complex feed networks,and limited beams in microwave ***,a digital coding transmissive metasurface(DCTMS)with a single layer substrate and the bi-symmetrical arrow is proposed and designed to generate multi-OAM-beam based on Pancharatnam–Berry(PB)phase *** 3-bit phase response can be realized by encoding the geometric phase into rotation angle of unit cell for ***,the phase compensation of the metasurface is introduced to achieve the beam focusing and the conversion from spherical wave to plane *** to the digital convolution theorem,the far-field patterns and near-field distributions of multi-OAM-beam with l=–2 modes are adequately demonstrated by DCTMS *** OAM efficiency and the purity are calculated to demonstrate the excellent *** simulated and experimental results illustrate their performance of OAM *** designed DCTMS has profound application in multi-platform wireless communication systems and the multi-channel imaging systems.