Unidirectional reflectionlessness and perfect nonreciprocal absorption in stacked asymmetric metamaterial based on near-field coupling

被引：29
|
作者：
Bai, Ruiping [1 ]
Zhang, Cong [1 ]
Gu, Xintong [1 ]
Jin, Xing Ri [1 ]
Zhang, Ying Qiao [1 ]
Lee, YoungPak [2 ,3 ]
机构：
[1] Yanbian Univ, Coll Sci, Dept Phys, Yanji 133002, Jilin, Peoples R China
[2] Hanyang Univ, Quantum Photon Sci Res Ctr, Seoul 133791, South Korea
[3] Hanyang Univ, Dept Phys, Seoul 133791, South Korea
来源：
APPLIED PHYSICS EXPRESS | 2017年 / 10卷 / 11期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
ELECTROMAGNETICALLY-INDUCED TRANSPARENCY; NON-HERMITIAN HAMILTONIANS; GUIDE-CAVITY SYSTEMS; EXCEPTIONAL POINTS; PROPAGATION; RESONANCE; NANOSTRUCTURES; SYMMETRY; ANALOG;
D O I：
10.7567/APEX.10.112001
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We propose a scheme for achieving unidirectional reflectionlessness and perfect nonreciprocal absorption at the exceptional point, based on near-field coupling in a stacked asymmetric nanostrip metamaterial structure. The result of theoretical analysis shows good agreement with a numerical simulation. Unidirectional reflectionlessness is realized well in wide ranges of the parameters s and a. The absorbance reaches similar to 1 in the +z incident direction, and the contrast ratio of the reflectance between the +z and -z incident directions is similar to 1. (c) 2017 The Japan Society of Applied Physics
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页数：4
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