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

文献类型：期刊论文

作者Zhang, Jin3; Wei, Xingzhan2; Premaratne, Malin1; Zhu, Weiren3
刊名PHOTONICS RESEARCH
出版日期2019-08-01
卷号7期号:8页码:868-874
ISSN号2327-9125
DOI10.1364/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
WOS记录号WOS:000478104100010
出版者OPTICAL SOC AMER
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.

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来源：重庆绿色智能技术研究院

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