Generalized Magnetic Mirrors

被引：89
作者：
Liu, Wei [1 ]
机构：
[1] Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 12期
基金：
中国国家自然科学基金;
关键词：
DIELECTRIC METAMATERIALS; FREE-SPACE; SCATTERING; TERAHERTZ; NANOPHOTONICS; METASURFACES; CYLINDERS;
D O I：
10.1103/PhysRevLett.119.123902
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We propose generalized magnetic mirrors that can be achieved by excitations of sole electric resonances. Conventional approaches to obtain magnetic mirrors rely heavily on exciting the fundamental magnetic dipoles, whereas here we reveal that, besides magnetic resonances, electric resonances of higher orders can be also employed to obtain highly efficient magnetic mirrors. Based on the electromagnetic duality, it is also shown that electric mirrors can be achieved by exciting magnetic resonances. We provide direct demonstrations of the generalized mirrors proposed in a simple system of a one-dimensional periodic array of all-dielectric wires, which may shed new light on many advanced fields of photonics related to resonant multipolar excitations and interferences.
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页数：6
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