A broadband absorber with multiple tunable functions for terahertz band based on graphene and vanadium dioxide

被引：7
作者：
Nie, Sihan [1 ]
Feng, Hengli [1 ]
Li, Xin [1 ]
Sun, Pengfei [1 ]
Zhou, Yaxin [1 ]
Su, Lijing [1 ]
Ran, Lingling [1 ]
Gao, Yang [1 ,2 ]
机构：
[1] Heilongjiang Univ, Sch Elect Engn, Heilongjiang 150080, Peoples R China
[2] Heilongjiang Univ, Heilongjiang Prov Key Lab Metamaterials Phys & Dev, Heilongjiang 150080, Peoples R China
来源：
DIAMOND AND RELATED MATERIALS | 2023年 / 139卷
关键词：
Terahertz band; Metamaterial; Broadband; Absorber; METAMATERIAL ABSORBER; ABSORPTION; PHASE;
D O I：
10.1016/j.diamond.2023.110374
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A broadband perfect absorber tunable in terahertz band based on vanadium dioxide (VO2) and graphene met-amaterial is proposed. We have carried out numerical simulations using Finite-Difference Time-Domain (FDTD) method. This structure can tune the absorption rate of VO2 by changing its conductivity. Moreover, due to the addition of graphene, the absorption is improved and the bandwidth reaches 3.24 THz. The structure allows spectral shift by varying the Fermi level of graphene, which can achieve >90 % ultrawideband absorption in 3.74 to 6.96 THz range when the Fermi level is 0.8 eV. In the range of 4.338 to 6.332 THz, nearly 100 % absorption can be achieved. The proposed absorber also exhibits good polarization insensitivity and wide angle of incident stability. Our design has potential applications in terahertz spectroscopy and imaging, also can be applied to modulators, sensors, stealth and photoelectric switches.
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页数：8
相关论文
共 45 条
[1]   Graphene-Based Multiband Chiral Metamaterial Absorbers Comprised of Square Split-Ring Resonator Arrays With Different Numbers of Gaps, and Their Equivalent Circuit Model [J].
Asgari, Somayyeh ;
Fabritius, Tapio .
IEEE ACCESS, 2022, 10 :63658-63671
[2]   Graphene-based dual-functional chiral metamirror composed of complementary 90° rotated U-shaped resonator arrays and its equivalent circuit model [J].
Asgari, Somayyeh ;
Fabritius, Tapio .
SCIENTIFIC REPORTS, 2021, 11 (01)
[3]   Equivalent circuit model of graphene chiral multi-band metadevice absorber composed of U-shaped resonator array [J].
Asgari, Somayyeh ;
Fabritius, Tapio .
OPTICS EXPRESS, 2020, 28 (26) :39850-39867
[4]   Tunable broadband THz absorber using vanadium dioxide metamaterials [J].
Bai, Jinjun ;
Zhang, Shusheng ;
Fan, Fei ;
Wang, Shasha ;
Sun, Xiaodong ;
Miao, Yinping ;
Chang, Shengjiang .
OPTICS COMMUNICATIONS, 2019, 452 :292-295
[5]  
Bao QL, 2011, NAT PHOTONICS, V5, P411, DOI [10.1038/nphoton.2011.102, 10.1038/NPHOTON.2011.102]
[6]   Tunable Isotropic Absorber With Phase Change Material VO2 [J].
Chen, Apeng ;
Song, Zhengyong .
IEEE TRANSACTIONS ON NANOTECHNOLOGY, 2020, 19 :197-200
[7]   Interference theory of metamaterial perfect absorbers [J].
Chen, Hou-Tong .
OPTICS EXPRESS, 2012, 20 (07) :7165-7172
[8]   Wide-angle polarization independent infrared broadband absorbers based on metallic multi-sized disk arrays [J].
Cheng, Cheng-Wen ;
Abbas, Mohammed Nadhim ;
Chiu, Chao-Wei ;
Lai, Kun-Ting ;
Shih, Min-Hsiung ;
Chang, Yia-Chung .
OPTICS EXPRESS, 2012, 20 (09) :10376-10381
[9]   A tunable broadband terahertz metamaterial absorber based on the vanadium dioxide [J].
Dao, Ri-na ;
Kong, Xin-ru ;
Zhang, Hai-feng ;
Su, Xin-ran .
OPTIK, 2019, 180 :619-625
[10]   Apertureless near-field terahertz imaging using the self-mixing effect in a quantum cascade laser [J].
Dean, Paul ;
Mitrofanov, Oleg ;
Keeley, James ;
Kundu, Iman ;
Li, Lianhe ;
Linfield, Edmund H. ;
Davies, A. Giles .
APPLIED PHYSICS LETTERS, 2016, 108 (09)
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