Tunable Graphene-based Plasmonic Perfect Metamaterial Absorber in the THz Region

被引：79

作者：

Yi, Zao ^{[1
]}

Chen, Jiajia ^{[1
]}

Cen, Chunlian ^{[1
]}

Chen, Xifang ^{[1
]}

Zhou, Zigang ^{[1
]}

Tang, Yongjian ^{[1
]}

Ye, Xin ^{[2
]}

Xiao, Shuyuan ^{[3
]}

Luo, Wei ^{[4
]}

Wu, Pinghui ^{[5
]}

机构：

[1] Southwest Univ Sci & Technol, Sch Sci, Mianyang 621010, Peoples R China

[2] China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Peoples R China

[3] Nanchang Univ, Inst Adv Study, Nanchang 330031, Jiangxi, Peoples R China

[4] Cent S Univ, Changsha 410013, Hunan, Peoples R China

[5] Quanzhou Normal Univ, Key Lab Informat Funct Mat Fujian Higher Educ, Photon Technol Res & Dev Ctr, Quanzhou 362000, Fujian, Peoples R China

来源：

MICROMACHINES | 2019年 / 10卷 / 03期

基金：

中国国家自然科学基金;

关键词：

perfect metamaterial absorber; FDTD method; graphene; surface plasmon resonance; ABSORPTION ENHANCEMENT; NI NANOCRYSTALS; WAVE-GUIDE; FABRICATION; EXCITATION; GATE;

D O I：

10.3390/mi10030194

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The optical performance of a periodically tunable plasma perfect metamaterial absorber based on a square-square-circle array we propose in the terahertz region is analyzed in this work by the finite difference time domain (FDTD) method. We not only discuss the impact of various parameters such as period a, length L, radius R, and incident angle theta under transverse magnetic (TM)- and transverse electric (TE)-polarization on the absorption spectra of the absorber but also study the effect of the Fermi energy E-F and relaxation time tau. Finally, we simulate the spectra as the surrounding refractive index n changes to better evaluate the sensing performance of the structure, producing a sensitivity S of the structure of up to 15006 nm/RIU. On account of this research, we find that the absorber is beneficial to sensors and detectors in the terahertz region.

引用

页数：11

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