Multifrequency superscattering pattern shaping  

作　　者：Yao Qin Jinying Xu Yineng Liu Huanyang Chen 秦瑶;徐金英;刘益能;陈焕阳(Institute of Electromagnetics and Acoustics and School of Electronic Science and Engineering,Xiamen University,Xiamen 361005,China;Department of Physics,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]Institute of Electromagnetics and Acoustics and School of Electronic Science and Engineering,Xiamen University,Xiamen 361005,China [2]Department of Physics,Fuzhou University,Fuzhou 350108,China

出　　处：《Chinese Optics Letters》2021年第12期130-136,共7页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11504306 and 92050102);Fujian Provincial Natural Science Foundation(No.2017J05015)。

摘　　要：Multifrequency superscattering is a phenomenon in which the scattering cross section from a subwavelength object simultaneously exceeds the single-channel limit at multiple frequency regimes.Here,we achieve simultaneously,within a graphene-coated subwavelength structure,multifrequency superscattering and superscattering shaping with different engineered scattering patterns.It is shown that multimode degenerate resonances at multiple frequency regimes appearing in a graphene composite structure due to the peculiar dispersion can be employed to resonantly overlap electric and magnetic multipoles of various orders,and,as a result,effective multifrequency superscattering with different engineered angular patterns can be obtained.Moreover,the phenomena of multifrequency superscattering have a high tolerance to material losses and some structural variations.Our work should anticipate extensive applications ranging from emission enhancing,energy harvesting,and antenna design with improved sensitivity and accuracy due to multifrequency operation.

关 键 词：superscattering pattern shaping subwavelength structure GRAPHENE plasmon polariton 

分 类 号：O441[理学—电磁学] TQ127.11[理学—物理]