Electrically Tunable Metasurface with Independent Frequency and Amplitude Modulations

doi:10.1021/acsphotonics.9b01532

	Electrically Tunable Metasurface with Independent Frequency and Amplitude Modulations
	Zhang, Jin 2; Wei, Xingzhan 3; Rukhlenko, Ivan D.1,4; Chen, Hou-Tong 5; Zhu, Weiren 2
刊名	ACS PHOTONICS
	2020
卷号	7 期号:1 页码:265-271
关键词	graphene electrically tunable metasurface dual-tunability
ISSN号	2330-4022
DOI	10.1021/acsphotonics.9b01532
通讯作者	Zhu, Weiren(weiren.zhu@sjtu.edu.cn)
英文摘要	Metasurfaces with actively tunable features are highly demanded for advanced applications in electronic and electromagnetic systems. However, realizing independent dual-tunability remains challenging and requires more efforts. In this paper, we present an active metasurface where the magnitude and frequency of the resonant absorption can be continuously and independently tuned through application of voltage biases. Such a dual-tunability is accomplished at microwave frequencies by combining a varactor-loaded high-impedance surface and a graphene-based sandwich structure. By electrically controlling the Fermi energy of graphene and the capacitance of varactor diodes, we experimentally demonstrate the independent shifting of the working frequency from 3.41 to 4.55 GHz and tuning of the reflection amplitude between -3 and -30 dB, which is in excellent agreement with full-wave numerical simulations. We further employed an equivalent lumped circuit model to elucidate the mechanism of the dual-tunability resulting from the graphene-based sandwich structure and the active high-impedance surface. We speculate that such a dual-tunability scheme can be potentially extended to terahertz and optical regimes by employing different active/dynamical tuning methods and materials integration, thereby enabling a variety of practical applications.
资助项目	National Natural Science Foundation of China (NSFC)[61701303] ; National Natural Science Foundation of China (NSFC)[11574308] ; Natural Science Foundation of Shanghai[17ZR1414300] ; Russian Science Foundation (RSF)[19-13-00332] ; Los Alamos National Laboratory Laboratory-Directed Research and Development (LDRD) program ; U.S. Department of Energy's NNSA[89233218CNA000001]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Optics ; Physics
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000508475800031
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/10216]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Zhu, Weiren
作者单位	1.Univ Sydney, Sch Phys, IPOS, Camperdown, NSW 2006, Australia 2.Shanghai Jiao Tong Univ, Dept Elect Engn, Shanghai 200240, Peoples R China 3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 4.ITMO Univ, Informat Opt Technol Ctr, St Petersburg 197101, Russia 5.Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA
推荐引用方式 GB/T 7714	Zhang, Jin,Wei, Xingzhan,Rukhlenko, Ivan D.,et al. Electrically Tunable Metasurface with Independent Frequency and Amplitude Modulations[J]. ACS PHOTONICS,2020,7(1):265-271.
APA	Zhang, Jin,Wei, Xingzhan,Rukhlenko, Ivan D.,Chen, Hou-Tong,&Zhu, Weiren.(2020).Electrically Tunable Metasurface with Independent Frequency and Amplitude Modulations.ACS PHOTONICS,7(1),265-271.
MLA	Zhang, Jin,et al."Electrically Tunable Metasurface with Independent Frequency and Amplitude Modulations".ACS PHOTONICS 7.1(2020):265-271.