Polarization-Dependent, Frequency-Selective THz Stereometamaterial Perfect Absorber

被引：50

作者：

Hokmabadi, Mohammad Parvinnezhad ^{[1
]}

Wilbert, David S. ^{[1
]}

Kung, Patrick ^{[1
]}

Kim, Seongsin M. ^{[1
]}

机构：

[1] Univ Alabama, Elect & Comp Engn Dept, Tuscaloosa, AL 35487 USA

来源：

PHYSICAL REVIEW APPLIED | 2014年 / 1卷 / 04期

基金：

美国国家科学基金会;

关键词：

BAND METAMATERIAL ABSORBER; INDEX; BROAD; DESIGN; MODES;

D O I：

10.1103/PhysRevApplied.1.044003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present design, fabrication, and characterization of THz stereometamaterial perfect absorber devices. Stereometamaterials consist of a three-dimensional lattice of meta-atoms, which exhibits distinct optical properties depending on the spatial arrangement of the meta-atoms in the unit cell. Integrated into a perfect absorber structure, the absorption and reflection properties of such devices at resonant frequencies reveal unique characteristics that are controlled by the polarization of the incident wave. Because of the break in reflection symmetry, such devices act as polarization-dependent passive switches, with the frequency response of a single band or a dual band absorber. The observed behavior is interpreted in terms of dipole-dipole interaction between the dipoles of the meta-atoms and their mirror images with respect to the metal backplane.

引用

页数：8

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