基于场变换理论的大角度涡旋电磁波生成方法  

Wide-angle method for vortex electromagnetic wave generation using field transformation

作　　者：冯加林 施宏宇[1] 王远[2] 张安学[2] 徐卓[3] Feng Jia-Lin;Shi Hong-Yu;Wang Yuan;Zhang An-Xue;Xu Zhuo(Key Laboratory for Multifunctional Materials and Structures,Ministry of Education,Xi’an Jiaotong University,Xi’an 710049,China;Faculty of Electronics and Information,Xi’an Jiaotong University,Xi’an 710049,China;Key Laboratory for Electronic Materials Research Laboratory,Ministry of Education,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学,多功能材料与结构教育部重点实验室,西安710049 [2]西安交通大学,电子与信息学部,西安710049 [3]西安交通大学,电子陶瓷与器件教育部重点实验室,西安710049

出　　处：《物理学报》2020年第13期167-176,共10页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61871315)资助的课题.

摘　　要：场变换是一种与入射角度无关的新型电磁变换方法,可对电磁波极化和阻抗进行调控.本文提出了一种基于场变换理论的大角度入射涡旋电磁波产生方法.基于该方法设计了一种用于涡旋电磁波生成的人工媒质,并通过对其仿真验证了所提出的方法.设计的人工媒质为多层环形结构,可以透射生成2阶涡旋电磁波,并且具有较好的入射角度稳定性,在60°斜入射时仍能产生涡旋电磁波.The Field transformation(FT)is a novel theory for controlling the polarization and impedance of electromagnetic waves,which is independent on the angle of incidence.Thus,the FT method is superior for wide-angle devices design.In this paper,we propose a wide-angle method for generating vortex beam based on the FT theory.According to this method,an artificial media for vortex beam generation is designed and simulated,which demonstrates the proposed method.The designed artificial media is a multi-layered structure,which can generate vortex beam of order 2 with an incident angle stability up to 60°.

关 键 词：轨道角动量 场变换 大角度入射 涡旋电磁波 

分 类 号：O441.4[理学—电磁学]