Wideband THz metamaterial absorber based on unpatterned resistive-sheet and water layers

被引：4
作者：
Ruan, Jiu-Fu [1 ,2 ]
Zhu, Da-Wei [1 ,2 ]
Tao, Zhi [1 ,2 ]
Zou, Rui-Zhi [1 ,2 ]
Pan, Sheng-Min [3 ]
机构：
[1] Hefei Univ Technol, Acad Opt Elect Technol, Natl Engn Lab Special Display Technol, Hefei, Peoples R China
[2] Hefei Univ Technol, Sch Instrument Sci & Optoelect Engn, Anhui Prov Key Lab Measuring Theory & Precis Instr, Hefei, Peoples R China
[3] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
来源：
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS | 2023年 / 37卷 / 14期
关键词：
Terahertz; metamaterial absorber; broadband; water; resistive sheet; DESIGN; ABSORPTION;
D O I：
10.1080/09205071.2023.2230183
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A metamaterial absorber (MA) based on unpatterned resistive-sheet and water layers is proposed. It can provide wideband absorption with the absorptivity over 90% from 162 GHz to 1.5 THz and the relative bandwidth is high up to 161%. The anti-parallel surface currents between the layers of resistive-sheet and ground metal produce magnetic resonance, which contributes to a portion of the absorption. It is found that the water layer plays a leading role in the broadband strong absorption and the main power loss is concentrated in the water layer, which is mainly attributed to magnetic resonance at the border between water layer and PDMS layer. In addition, the absorber has polarization insensitivity and good stability at wide incident angles. The design of the proposed absorber is validated by the consistency between the simulated and calculated results. This work may provide a simple and time-saving approach to design wideband MAs.
引用
收藏
页码：1221 / 1233
页数：13
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