Tunable plasmonic absorber in THz-band range based on graphene arrow shaped metamaterial

doi:10.1016/j.rinp.2019.102777

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	Tunable plasmonic absorber in THz-band range based on graphene arrow shaped metamaterial
	Qi, Yunping 1,3; Liu, Chuqin 1; Hu, Bingbing 1; Deng, Xiangyu 1,3; Wang, Xiangxian 2
刊名	RESULTS IN PHYSICS
	2019-12-01
卷号	15
关键词	Graphene Metamaterial Absorber Finite Difference Time Domain method Surface plasmon
ISSN号	2211-3797
DOI	10.1016/j.rinp.2019.102777
英文摘要	A tunable selective absorber consisting of a periodic arrow shaped graphene array that operates in the far infrared and terahertz range is proposed. It is achieved by depositing a set of graphene arrow shaped ribbon on a SiO2 dielectric spacer layer. The absorption characteristics of the structure are investigated by the Finite Difference Time Domain (FDTD) method. The results show that the maximum pure absorption rate at the resonant wavelength increases from 1.09% corresponding to Fermi energy level 0.2 eV to 12.76% corresponding to 0.8 eV, which is improved by nearly 12 times. Moreover, the relaxation time is increased from 0.1 ps to 1.0 ps with the other parameters are unchanged, and the maximum value of the pure graphene absorption peak increases from 1.62% to 11.55%. Moreover, the resonance wavelengths of the absorber possess angle insensitivity, nevertheless the absorption peak intensity is sensitive to the angle of incidence. In addition, this paper also compares the double-symmetric arrow shaped structure on the basis of this structure. The absorption spectrum of the structure shows a double peak phenomenon, which can achieve the purpose of selective absorption. The research results have certain guiding significance and important reference value for the design of next-generation graphene-based perfect terahertz absorbers, and the design can be applied to the fields of label-free biomedical sensing, photodetectors and photonic devices.
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000502391000251
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155296]
专题	理学院
作者单位	1.Northwest Normal Univ, Coll Phys & Elect Engn, Lanzhou 730070, Gansu, Peoples R China; 2.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Gansu, Peoples R China; 3.Northwest Normal Univ, Engn Res Ctr Gansu Provence Intelligent Informat, Lanzhou 730070, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Qi, Yunping,Liu, Chuqin,Hu, Bingbing,et al. Tunable plasmonic absorber in THz-band range based on graphene arrow shaped metamaterial[J]. RESULTS IN PHYSICS,2019,15.
APA	Qi, Yunping,Liu, Chuqin,Hu, Bingbing,Deng, Xiangyu,&Wang, Xiangxian.(2019).Tunable plasmonic absorber in THz-band range based on graphene arrow shaped metamaterial.RESULTS IN PHYSICS,15.
MLA	Qi, Yunping,et al."Tunable plasmonic absorber in THz-band range based on graphene arrow shaped metamaterial".RESULTS IN PHYSICS 15(2019).