Ultra-broadband terahertz absorber based on a multilayer graphene metamaterial

2020 ◽  
Vol 128 (9) ◽  
pp. 093104 ◽  
Author(s):  
Ling Liu ◽  
Wenwen Liu ◽  
Zhengyong Song
Keyword(s):  
Multilayer Graphene ◽  
Terahertz Absorber ◽  
Broadband Terahertz

A high-performance broadband terahertz absorber based on multilayer graphene squares

2021 ◽  
Vol 96 (5) ◽  
pp. 055504
Author(s):  
Wenwen Liu ◽  
Zhengyong Song ◽  
Weihua Wang
Keyword(s):  
High Performance ◽  
Multilayer Graphene ◽  
Terahertz Absorber ◽  
Broadband Terahertz

scholarly journals Broadband terahertz absorber realized by self-assembled multilayer glass spheres

2012 ◽  
Vol 20 (12) ◽  
pp. 13566 ◽  
Author(s):  
Dae-Seon Kim ◽  
Dong-Hyun Kim ◽  
Sehyun Hwang ◽  
Jae-Hyung Jang
Keyword(s):  
Terahertz Absorber ◽  
Glass Spheres ◽  
Self Assembled ◽  
Broadband Terahertz

Simulation and experiments for a broadband terahertz absorber

2011 ◽  
Vol 9 (s1) ◽  
pp. s10402-310404 ◽  
Author(s):  
Dainan Zhang Dainan Zhang ◽  
Qiye Wen Qiye Wen ◽  
Yunsong Xie Yunsong Xie
Keyword(s):  
Terahertz Absorber ◽  
Broadband Terahertz

Broadband Terahertz Absorber Based on Three-layer Gratings

2016 ◽  
Vol 45 (11) ◽  
pp. 1105001
Author(s):  
郭剑琴 GUO Jian-qin ◽  
徐德刚 XU De-gang ◽  
刘鹏翔 LIU Peng-xiang ◽  
王与烨 WANG Yu-ye ◽  
钟凯 ZHONG Kai ◽  
...  
Keyword(s):  
Terahertz Absorber ◽  
Broadband Terahertz

scholarly journals Dual-Tunable Broadband Terahertz Absorber Based on a Hybrid Graphene-Dirac Semimetal Structure

Micromachines ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1096
Author(s):  
Jiali Wu ◽  
Xueguang Yuan ◽  
Yangan Zhang ◽  
Xin Yan ◽  
Xia Zhang
Keyword(s):  
Fermi Energy ◽  
Incident Angle ◽  
Normal Incidence ◽  
Surface Conductivity ◽  
Chemical Doping ◽  
Absorption Bandwidth ◽  
Terahertz Absorber ◽  
Dirac Semimetal ◽  
High Absorption ◽  
Broadband Terahertz

A dual-controlled tunable broadband terahertz absorber based on a hybrid graphene-Dirac semimetal structure is designed and studied. Owing to the flexible tunability of the surface conductivity of graphene and relative permittivity of Dirac semimetal, the absorption bandwidth can be tuned independently or jointly by shifting the Fermi energy through chemical doping or applying gate voltage. Under normal incidence, the device exhibits a high absorption larger than 90% over a broad range of 4.06–10.7 THz for both TE and TM polarizations. Moreover, the absorber is insensitive to incident angles, yielding a high absorption over 90% at a large incident angle of 60° and 70° for TE and TM modes, respectively. The structure shows great potential in miniaturized ultra-broadband terahertz absorbers and related applications.

A dynamically tunable and wide-angle terahertz absorber based on graphene-dielectric grating

2020 ◽  
Vol 34 (27) ◽  
pp. 2050292
Author(s):  
Chunyan Wu ◽  
Yiqiang Fang ◽  
Linbao Luo ◽  
Kai Guo ◽  
Zhongyi Guo
Keyword(s):  
Chemical Potential ◽  
Incident Angle ◽  
Near Field ◽  
Absorption Efficiency ◽  
Multilayer Graphene ◽  
Wide Angle ◽  
Terahertz Absorber ◽  
Tunable Range ◽  
Magnetic Components ◽  
Dielectric Grating

We theoretically and numerically demonstrate a tunable and wide-angle terahertz absorber, which is composed of multilayer graphene-dielectric grating and bottom metal substrate. Numerical simulation shows that the proposed absorber has the advantage of dynamically tunable range from 1.015 THz to 1.165 THz when the chemical potential of graphene increases from 10 meV to 150 meV. The absorption efficiency can reach a high value of 99%. To show the working mechanism of absorption, the near field distributions of magnetic components are presented at the absorption wavelength. We also demonstrate that the tunable range of absorption can be engineered by designing the geometry parameters. In addition, it is shown that the designed absorber can maintain the good performance of absorption over a wide incident angle from [Formula: see text] to [Formula: see text] under TM-polarization.

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