Plasmonic absorption characteristics based on dumbbell-shaped graphene metamaterial arrays

被引：53

作者：

Cen, Chunlian ^{[1
,2
]}

Chen, Jiajia ^{[1
,2
]}

Liang, Cuiping ^{[1
,2
]}

Huang, Jing ^{[1
,2
]}

Chen, Xifang ^{[1
,2
]}

Tang, Yongjian ^{[1
,2
]}

Yi, Zao ^{[1
,2
]}

Xu, Xibin ^{[3
]}

Yi, Yougen ^{[4
]}

Xiao, Shuyuan ^{[5
]}

机构：

[1] Southwest Univ Sci & Technol, Joint Lab Extreme Condit Matter Properties, Mianyang 621010, Peoples R China

[2] Sichuan Civil Mil Integrat Inst, Mianyang 621010, Peoples R China

[3] China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621010, Peoples R China

[4] Cent S Univ, Coll Phys & Elect, Changsha 410083, Hunan, Peoples R China

[5] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2018年 / 103卷

基金：

中国国家自然科学基金;

关键词：

Graphene plasmon; Metamaterial; Absorber; Far-infrared and terahertz; FDTD; BROAD-BAND; OPTICAL MODULATOR; ENHANCEMENT; ABSORBER; PHOTODETECTOR; FILMS; TRANSPARENCY; ANTENNA; SURFACE; REGIME;

D O I：

10.1016/j.physe.2018.05.033

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper, we proposed a theoretical model in the far-infrared and terahertz (THz) bands, which are dumbbell-shaped graphene metamaterial arrays with a combination of graphene nanobelt and two semisphere-suspended heads. We report a detailed theoretical investigation on how to enhance localized electric field and the absorption in the dumbbell-shaped graphene metamaterial arrays. The simulation results show that absorption characteristics can be changed by changing the geometrical parameters of the structure and the Fermi level of graphene. Furthermore, we have discovered that the resonant wavelength is insensitive to TM polarization. In addition, we also find that the double-layer graphene arrays have better absorption characteristics than single-layer graphene arrays. This work allows us to achieve tunable terahertz absorber and may also provide potential applications in optical filter and biochemical sensing.

引用

页码：93 / 98

页数：6

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