Tunable dual-band perfect absorber consisting of periodic cross-cross monolayer graphene arrays

被引：60
作者：
Yi, Zao [1 ,2 ]
Liu, Lin [1 ,2 ]
Wang, Lei [1 ,2 ]
Cen, Chunlian [1 ,2 ]
Chen, Xifang [1 ,2 ]
Zhou, Zigang [1 ,2 ]
Ye, Xin [3 ]
Yi, Yong [1 ,2 ]
Tang, Yongjian [2 ]
Yi, Yougen [4 ]
Wu, Pinghui [5 ]
机构：
[1] Southwest Univ Sci & Technol, Joint Lab Extreme Condit Matter Properties, Mianyang 621010, Sichuan, Peoples R China
[2] Sichuan Civil Mil Integrat Inst, Mianyang 621010, Sichuan, Peoples R China
[3] China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621010, Sichuan, Peoples R China
[4] Cent S Univ, Coll Phys & Elect, Changsha 410083, Peoples R China
[5] Quanzhou Normal Univ, Key Lab Informat Funct Mat Fujian Higher Educ, Res Ctr Photon Technol, Quanzhou 362000, Fujian, Peoples R China
来源：
RESULTS IN PHYSICS | 2019年 / 13卷
基金：
中国国家自然科学基金;
关键词：
Graphene; Perfect absorber; Surface plasmon; FDTD; PLASMONIC WAVE-GUIDE; ABSORPTION ENHANCEMENT; METAMATERIAL ABSORBER; MOLYBDENUM-DISULFIDE; INDUCED TRANSPARENCY; NI NANOCRYSTALS; PERFORMANCE;
D O I：
10.1016/j.rinp.2019.102217
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, we propose a tunable dual-band perfect absorber, which makes the thicker SiO2 dielectric as a spacer to separate the gold layer from the periodic cross-cross monolayer graphene array layer which locates the roof of whole absorber. The simulation results indicate that transforming the periodic p, the geometrical parameters of array and the thickness of SiO2 medium can make the structure achieve perfect absorption in dualband. Moreover, the resonance wavelength and absorption peak can be flexibly selected by Fermi level and relaxation time. In addition, the absorber is insensitive to incident angle, whether TM polarization or TE polarization. Therefore, the study provides a novel inspiration for the design of graphene-based tunable multi-band perfect THz absorber, which can be applied to photodetectors, chemical sensors and other optoelectronic devices.
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页数：7
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