Coherent perfect absorber and laser modes in purely imaginary metamaterials

被引：18

作者：

Fu, Yangyang ^{[1
,2
,3
]}

Cao, Yanyan ^{[1
]}

Cummer, Steven A. ^{[4
]}

Xu, Yadong ^{[1
]}

Chen, Huanyang ^{[1
,2
,3
]}

机构：

[1] Soochow Univ, College Phys Optoelect & Energy, Suzhou 215006, Peoples R China

[2] Xiamen Univ, Inst Electromagnet & Acoust, Xiamen 361005, Peoples R China

[3] Xiamen Univ, Dept Elect Sci, Xiamen 361005, Peoples R China

[4] Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA

来源：

PHYSICAL REVIEW A | 2017年 / 96卷 / 04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：

REFRACTION; INDEX; CLOAK;

D O I：

10.1103/PhysRevA.96.043838

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Conjugate metamaterials, in which the permittivity and the permeability are complex conjugates of each other, possess the elements of loss and gain simultaneously. By employing a conjugate metamaterial with a purely imaginary form, we propose a mechanism for realizing both coherent perfect absorber (CPA) and laser modes. Moreover, the general conditions for obtaining CPA and laser modes, including obtaining them simultaneously, are revealed by analyzing thewave scattering properties of a slab made of purely imaginary metamaterials (PIMs). Specifically, in a PIM slab with a subunity effective refractive index, the CPA mode can be simplified as a perfect absorption mode and the incident wave from one side could be perfectly absorbed.

引用

页数：7

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