A Tunable Terahertz Metamaterial Absorber Composed of Hourglass-Shaped Graphene Arrays

doi:10.3390/nano10030533

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	A Tunable Terahertz Metamaterial Absorber Composed of Hourglass-Shaped Graphene Arrays
	Qi, Yunping 1,2; Zhang, Yu 1; Liu, Chuqin 1; Zhang, Ting 1; Zhang, Baohe 1; Wang, Liyuan 1; Deng, Xiangyu 1,2; Wang, Xiangxian 3; Yu, Yang 4
刊名	NANOMATERIALS
	2020-03-01
卷号	10 期号:3
关键词	graphene metamaterial absorber surface plasmon resonance finite difference time domain
DOI	10.3390/nano10030533
英文摘要	In this paper, we demonstrate a tunable periodic hourglass-shaped graphene arrays absorber in the infrared (IR) and terahertz (THz) frequency bands. The effects of graphene geometric parameters, chemical potentials, periods, and incident angles on the pure absorption characteristics are studied by using the Finite Difference Time Domain (FDTD) method. In addition, this paper also analyzes the pure absorption characteristics of bilayer graphene arrays. The simulation results show that the maximum absorption reaches 38.2% for the monolayer graphene structure. Furthermore, comparing the bilayer graphene structure with the monolayer structure under the same conditions shows that the bilayer structure has a tunable dual-band selective absorption effect and has a higher maximum absorption of 41.7%. Moreover, it was found that there are dual-band tunable absorption peaks at 21.6 mu m and 36.3 mu m with the maximum absorption of 41.7% and 11%. The proposed structure is a convenient method which could be used in the design of graphene-based optoelectronic devices, biosensors, and environmental monitors.
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	MDPI
WOS记录号	WOS:000526090400133
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155225]
专题	理学院
作者单位	1.Northwest Normal Univ, Coll Phys & Elect Engn, Lanzhou 730070, Peoples R China; 2.Northwest Normal Univ, Engn Res Ctr Gansu Provence Intelligent Informat, Lanzhou 730070, Peoples R China; 3.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China; 4.Univ Technol Sydney, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia
推荐引用方式 GB/T 7714	Qi, Yunping,Zhang, Yu,Liu, Chuqin,et al. A Tunable Terahertz Metamaterial Absorber Composed of Hourglass-Shaped Graphene Arrays[J]. NANOMATERIALS,2020,10(3).
APA	Qi, Yunping.,Zhang, Yu.,Liu, Chuqin.,Zhang, Ting.,Zhang, Baohe.,...&Yu, Yang.(2020).A Tunable Terahertz Metamaterial Absorber Composed of Hourglass-Shaped Graphene Arrays.NANOMATERIALS,10(3).
MLA	Qi, Yunping,et al."A Tunable Terahertz Metamaterial Absorber Composed of Hourglass-Shaped Graphene Arrays".NANOMATERIALS 10.3(2020).