Hybridization-induced broadband terahertz wave absorption with graphene metasurfaces

被引：229

作者：

Mou, Nanli ^{[1
,7
]}

Sun, Shulin ^{[2
,3
]}

Dong, Hongxing ^{[1
]}

Dong, Shaohua ^{[2
,3
]}

He, Qiong ^{[4
,5
]}

Zhou, Lei ^{[4
,5
,6
]}

Zhang, Long ^{[1
,7
,8
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Key Lab Mat High Power Laser, Shanghai 201800, Peoples R China

[2] Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Green Photon, Shanghai 200433, Peoples R China

[3] Fudan Univ, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China

[4] Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China

[5] Fudan Univ, Key Lab Micro & Nano Photon Struct, Minist Educ, Shanghai 200433, Peoples R China

[6] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[7] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[8] Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA CICIFSA, Shanghai 200240, Peoples R China

来源：

OPTICS EXPRESS | 2018年 / 26卷 / 09期

基金：

中国国家自然科学基金;

关键词：

METAMATERIAL ABSORBER; LIGHT-ABSORPTION; NANOSTRUCTURED GRAPHENE; PERFECT ABSORBER; ENHANCEMENT; PLASMONICS; REFRACTION; SURFACES; ARRAYS; INDEX;

D O I：

10.1364/OE.26.011728

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Electromagnetic (EM) wave absorption plays a vital role in photonics. While metasurfaces are proposed to absorb EM waves efficiently, most of them exhibit limited bandwidth and fixed functionalities. Here, we propose a broadband and tunable terahertz (THz) absorber based on a graphene-based metasurface, which is constructed by a single layer of closely patterned graphene concentric double rings and a metallic mirror separated by an ultrathin SiO2 layer. Plasmonic hybridization between two graphene rings significantly enlarges the absorption bandwidth, which can be further tuned by gating the graphene. Moreover, the specific design also makes our device insensitive to the incident angle and polarization state of impinging EM waves. Our results may inspire certain wave-modulation-related applications, such as THz imaging, smart absorber, tunable sensor, etc. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：11728 / 11736

页数：9

共 49 条

[21] Plasmonic absorption enhancement in periodic cross-shaped graphene arrays [J].