1. A broadband planar THz metamaterial absorber.
- Author
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Xu, Zong-Cheng, Gao, Run-Mei, Ding, Chun-Feng, Zhang, Ya-Ting, Wu, Liang, Xu, De-Gang, and Yao, Jian-Quan
- Subjects
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BROADBAND antennas , *TERAHERTZ spectroscopy , *METAMATERIALS , *COPLANAR transmission lines , *ABSORPTION - Abstract
We propose the design of a broadband planar metamaterial absorber (MA) at terahertz frequencies. The unit cell of the MA is composed of four dual-band sub-cells with different dimensions in a coplanar. The four dual-band sub-cell structures resonate at several neighboring frequencies. The absorber consists of two metallic layers separated by a dielectric spacer. Simulation results show that the metamaterial absorption at normal incidence is above 90% in the frequency of 6.56-8.10 THz. This design provides an effective way to construct broadband absorber. The multiple-reflection theory was used to explain the absorption mechanism of our investigated structures. The coupling of adjacent four dual-band sub-cells can introduce additional capacitance to affect the performance of absorber. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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