Magnetic mirror by exciting magnetic quadrupole in dielectric metasurface
Magnetic mirror by exciting magnetic quadrupole in dielectric metasurface
复制标题
通过在介电超表面中激发磁四极子来磁镜
DOI：
10.1088/2040-8986/ab4dc8
复制
发表时间：
2019
影响因子：
2.1
通讯作者：
Wang Guo Ping
中科院分区：
文献类型：
--
作者：
Song Hao;Sun Lei;Hong Binbin;Wang Guo Ping
设计了一种工作频率在远红外波段、由简单球形粒子方阵组成的介质超颖表面上完全由磁四极共振控制的磁镜。该设计根据米氏理论通过颗粒的尺寸和电磁特性控制磁四极共振，并通过超颖表面的周期独立地优化反射率。因此，所设计的磁镜在界面附近具有显著的电场增强，并且对超颖表面的周期和探测电磁波的入射角具有鲁棒性。
A type of magnetic mirror entirely dominated by the magnetic quadrupole resonance in a dielectric metasurface consisting of a simple spherical particle square array is designed, with an operating frequency in the far infrared spectrum. The design controls the magnetic quadrupole resonance via the sizes and electromagnetic properties of the particles according to Mie theory and independently optimizes the reflectivity through the period of the metasurface. As a consequence, the designed magnetic mirror possesses notable electric field enhancement close to the interface and is robust to the period of the metasurface and the angle of incidence of the probing electromagnetic wave.