Numerical investigation of broadband THz metamaterial absorber with double composite structure layer

被引：16

作者：

Bai, Jinjun ^{[1
,2
]}

Ge, Meilan ^{[1
,2
]}

Li, Jining ^{[3
]}

Tang, Chunxiao ^{[1
,2
]}

Sun, Xiaodong ^{[1
,2
]}

Xing, Haiying ^{[1
,2
]}

Chang, Shengjiang ^{[4
]}

机构：

[1] Tianjin Key Lab Optoelect Detect Technol & Syst, Tianjin 300387, Peoples R China

[2] Tianjin Polytech Univ, Sch Elect & Informat Engn, Tianjin 300387, Peoples R China

[3] Tianjin Univ, Inst Laser & Optoelect, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China

[4] Nankai Univ, Inst Modern Opt, Key Lab Opt Informat Sci & Technol, Minist Educ, Tianjin 300071, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2018年 / 423卷

关键词：

Terahertz; Metamaterial; Broadband absorber; Composite structure layer; TERAHERTZ; ABSORPTION; RESONATOR;

D O I：

10.1016/j.optcom.2018.04.011

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A broadband terahertz (THz) metamaterial absorber (MA) based on a double composite structure layer on a metallic board is proposed. Each layer consists of four different sized square metallic plates. The absorbing properties and variation laws have been numerically investigated with FDTD method. The numerical results show that the absorber bandwidth is 0.642 THz with the central frequency around 1.901 THz. The physical mechanism of the broadband absorber can be explained as the overlapping of eight closely resonance frequencies using the analysis of magnetic field distribution. Besides, the proposed absorber has several advantages, including the polarization insensitive, large angle tolerance and potential to be applied for integrated THz photoelectric devices.

引用

页码：63 / 68

页数：6

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