Ultra-broadband and polarization-independent planar absorber based on multilayered graphene  

作　　者：王娇 高超宁 姜彦南 Charles Nwakanma Akwuruoha 

机构地区：[1]Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing [2]Key Laboratory of Cognitive Radio and Information Processing (Ministry of Education), Guilin University of Electronic Technology [3]School of Electrical and Electronic Engineering, University of Manchester

出　　处：《Chinese Physics B》2017年第11期186-192,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.61661012,61461016,61361005,and 61561013);the Natural Science Foundation of Guangxi,China(Grant No.2017JJB160028);the Program for Innovation Research Team of Guilin University of Electronic Technology,China;the Dean Project of Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing,China

摘　　要：We propose an ultra-broadband and polarization independent planar absorber comprising multilayered graphene. The bandwidth of the proposed absorber is extended by increasing the number of layers of graphene, and it is polarization independent due to its symmetrical unit structure. The full wave simulation results show that an absorber with three graphenebased layers can efficiently harvest an electromagnetic wave with random polarization from 17.9 GHz to 188.7 GHz（i.e.,covering frequency regimes from K to D bands and relative bandwidth of - 165%）. The physical absorption mechanism of ultra-broadband absorption has been elaborated upon using the destructive interference method and multiple resonances approach in a multilayered medium. The proposed absorber can be used in many applications such as medical treatment,electromagnetic compatibility, and stealth technique.We propose an ultra-broadband and polarization independent planar absorber comprising multilayered graphene. The bandwidth of the proposed absorber is extended by increasing the number of layers of graphene, and it is polarization independent due to its symmetrical unit structure. The full wave simulation results show that an absorber with three graphenebased layers can efficiently harvest an electromagnetic wave with random polarization from 17.9 GHz to 188.7 GHz（i.e.,covering frequency regimes from K to D bands and relative bandwidth of - 165%）. The physical absorption mechanism of ultra-broadband absorption has been elaborated upon using the destructive interference method and multiple resonances approach in a multilayered medium. The proposed absorber can be used in many applications such as medical treatment,electromagnetic compatibility, and stealth technique.

关 键 词：multilayered graphene absorber ultra-broadband polarization independent 

分 类 号：O613.71[理学—无机化学] TB34[理学—化学]