Electrically tunable graphene metamaterial with strong broadband absorption

doi:10.1088/1361-6528/abc44f

	Electrically tunable graphene metamaterial with strong broadband absorption
	Yao, Wei 1,2; Tang, Linlong 2; Nong, Jinpeng 2; Wang, Jun 1; Yang, Jun 2; Jiang, Yadong 1; Shi, Haofei 2; Wei, Xingzhan 2
刊名	NANOTECHNOLOGY
	2021-02-12
卷号	32 期号:7 页码:8
关键词	graphene metamaterials hybridization Fermi level plasmons
ISSN号	0957-4484
DOI	10.1088/1361-6528/abc44f
通讯作者	Wang, Jun(wjun@uestc.edu.cn) ; Wei, Xingzhan(weixingzhan@cigit.ac.cn)
英文摘要	The coupling system with dynamic manipulation characteristics is of great importance for the field of active plasmonics and tunable metamaterials. However, the traditional metal-based architectures suffer from a lack of electrical tunability. In this study, a metamaterial composed of perpendicular or parallel graphene-Al2O3-graphene stacks is proposed and demonstrated, which allows for the electric modulation of both graphene layers simultaneously. The resultant absorption of hybridized modes can be modulated to more than 50% by applying an external voltage, and the absorption bandwidth can reach 3.55 mu m, which is 1.7 times enhanced than the counterpart of single-layer graphene. The modeling results demonstrate that the small relaxation time of graphene is of great importance to realize the broadband absorption. Moreover, the optical behaviors of the tunable metamaterial can be influenced by the incident polarization, the dielectric thickness, and especially by the Fermi energy of graphene. This work is of a crucial role in the design and fabrication of graphene-based broadband optical and optoelectronic devices.
资助项目	National Key R&D Program of China[2017YFE0131900] ; Natural Science Foundation of Chongqing, China[cstc2019jcyjjqX0017] ; National Outstanding Youth Science Fund Project of National Natural Science Foundation of China[61922022] ; Science Fund for Innovative Research Group Project of the National Natural Science Foundation of China[61421002]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000592331500001
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/12288]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Wang, Jun; Wei, Xingzhan
作者单位	1.Univ Elect Sci & Technol China, Sch Optoelect Sci & Engn, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式 GB/T 7714	Yao, Wei,Tang, Linlong,Nong, Jinpeng,et al. Electrically tunable graphene metamaterial with strong broadband absorption[J]. NANOTECHNOLOGY,2021,32(7):8.
APA	Yao, Wei.,Tang, Linlong.,Nong, Jinpeng.,Wang, Jun.,Yang, Jun.,...&Wei, Xingzhan.(2021).Electrically tunable graphene metamaterial with strong broadband absorption.NANOTECHNOLOGY,32(7),8.
MLA	Yao, Wei,et al."Electrically tunable graphene metamaterial with strong broadband absorption".NANOTECHNOLOGY 32.7(2021):8.