Impact of resonator geometry and its coupling with ground plane on ultrathin metamaterial perfect absorbers

被引：153

作者：

Huang, Li ^{[2
]}

Chowdhury, Dibakar Roy ^{[1
]}

Ramani, Suchitra ^{[1
]}

Reiten, Matthew T. ^{[1
]}

Luo, Sheng-Nian

Azad, Abul K. ^{[1
]}

Taylor, Antoinette J. ^{[1
]}

Chen, Hou-Tong ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA

[2] Harbin Inst Technol, Dept Phys, Harbin 150001, Heilongjiang, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 10期

关键词：

BAND; ABSORPTION; DESIGN;

D O I：

10.1063/1.4749823

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the impact of resonator geometry and its coupling with ground plane on the performance of metamaterial perfect absorbers. Using a cross-resonator as an example structure, we find that the absorber thickness can be further reduced through modifying the geometric dimensions of the resonators. Numerical simulations and theoretical calculations reveal that destructive interference of multiple reflections is responsible for the near-unity absorption. The near-field coupling between the resonator array and ground plane can be significant. When this coupling is taken into account, the theoretical results calculated using the interference model are in excellent agreement with experiments and numerical simulations. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4749823]

引用

页数：4

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