磁偶极子和非零级布拉格波在超材料完美吸收体中的作用。

The role of magnetic dipoles and non-zero-order Bragg waves in metamaterial perfect absorbers.

作者信息

Zeng Yong, Chen Hou-Tong, Dalvit Diego A R

机构信息

Theoretical Division, MS B213, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

出版信息

Opt Express. 2013 Feb 11;21(3):3540-6. doi: 10.1364/OE.21.003540.

DOI:10.1364/OE.21.003540

PMID:23481811

Abstract

We develop a simple treatment of a metamaterial perfect absorber (MPA) based on grating theory. We analytically prove that the condition of MPA requires the existence of two currents, which are nearly out of phase and have almost identical amplitude, akin to a magnetic dipole. Furthermore, we show that non-zero-order Bragg modes within the MPA may consume electromagnetic energy significantly.

摘要

我们基于光栅理论对超材料完美吸收体（MPA）进行了一种简单的处理。我们通过分析证明，MPA的条件要求存在两种电流，这两种电流相位几乎相反且幅度几乎相同，类似于磁偶极子。此外，我们表明MPA内的非零阶布拉格模式可能会显著消耗电磁能量。