Experimental demonstration of an electrically tunable broadband coherent perfect absorber based on a graphene-electrolyte-graphene sandwich structure

doi:10.1364/PRJ.7.000868

	Experimental demonstration of an electrically tunable broadband coherent perfect absorber based on a graphene-electrolyte-graphene sandwich structure
	Zhang, Jin3 ; Wei, Xingzhan2 ; Premaratne, Malin 1; Zhu, Weiren 3
刊名	PHOTONICS RESEARCH
	2019-08-01
卷号	7 期号:8 页码:868-874
ISSN号	2327-9125
DOI	10.1364/PRJ.7.000868
通讯作者	Zhu, Weiren(weiren.zhu@sjtu.edu.cn)
英文摘要	We propose and experimentally demonstrate the operation of an electrically tunable, broadband coherent perfect absorption (CPA) at microwave frequencies by harnessing the CPA features of a graphene-electrolyte-graphene sandwich structure (GSS). Using both a simplified lumped circuit model and full-wave numerical simulation, it is found that the microwave coherent absorptivity of the GSS can be tuned dynamically from nearly 50% to 100% by changing the Fermi level of the graphene. Strikingly, our simplified lumped circuit model agrees very well with the full-wave numerical model, offering valuable insight into the CPA operation of the device. The angle dependency of coherent absorption in the GSS is further investigated, making suggestions for achieving CPA at wide angles up to 80 degrees. To show the validity and accuracy of our theory and numerical simulations, a GSS prototype is fabricated and measured in a C-band waveguide system. The reasonably good agreement between the experimental and the simulated results confirms that the tunable coherent absorption in GSS can be electrically controlled by changing the Fermi level of the graphene. (C) 2019 Chinese Laser Press
资助项目	National Natural Science Foundation of China (NSFC)[11574308] ; National Natural Science Foundation of China (NSFC)[61701303] ; Natural Science Foundation of Shanghai[17PJ1404100] ; Natural Science Foundation of Shanghai[17ZR1414300]
WOS研究方向	Optics
语种	英语
出版者	OPTICAL SOC AMER
WOS记录号	WOS:000478104100010
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/8317]
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.Monash Univ, Dept Elect & Comp Syst Engn, Adv Comp & Simulat Lab AL, Clayton, Vic 3800, Australia 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 3.Shanghai Jiao Tong Univ, Dept Elect Engn, Shanghai 200240, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jin,Wei, Xingzhan,Premaratne, Malin,et al. Experimental demonstration of an electrically tunable broadband coherent perfect absorber based on a graphene-electrolyte-graphene sandwich structure[J]. PHOTONICS RESEARCH,2019,7(8):868-874.
APA	Zhang, Jin,Wei, Xingzhan,Premaratne, Malin,&Zhu, Weiren.(2019).Experimental demonstration of an electrically tunable broadband coherent perfect absorber based on a graphene-electrolyte-graphene sandwich structure.PHOTONICS RESEARCH,7(8),868-874.
MLA	Zhang, Jin,et al."Experimental demonstration of an electrically tunable broadband coherent perfect absorber based on a graphene-electrolyte-graphene sandwich structure".PHOTONICS RESEARCH 7.8(2019):868-874.