Tunable circular polarization conversion and asymmetric transmission of planar chiral graphene-metamaterial in terahertz region

被引：117

作者：

Huang, Yuanyuan ^{[1
]}

Yao, Zehan ^{[1
]}

Hu, Fangrong ^{[2
,3
]}

Liu, Changji ^{[1
]}

Yu, Leilei ^{[1
]}

Jin, Yanping ^{[1
]}

Xu, Xinlong ^{[1
,3
]}

机构：

[1] Northwest Univ, Int Collaborat Ctr Photoelect Technol & Nano Func, Inst Photon & Photon Technol,Shaanxi Joint Lab Gr, State Key Lab Incubat Base Photoelect Technol & M, Xian 710069, Peoples R China

[2] Guilin Univ Elect Technol, Coll Elect Engn & Automatizat, Lab Terahertz, Guilin 541004, Peoples R China

[3] Guilin Univ Elect Technol, Guangxi Key Lab Automat Detecting Technol & Instr, Guilin 541004, Peoples R China

来源：

CARBON | 2017年 / 119卷

基金：

中国国家自然科学基金;

关键词：

RESONATORS; ABSORPTION; MODE;

D O I：

10.1016/j.carbon.2017.04.037

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two-dimensional chirality induced polarization conversion and asymmetric transmission have great potential for polarization applications. We propose graphene-based planar chiral metamaterial and its complementary structure with dual functionality of both circular polarization conversion and asymmetric transmission in terahertz (THz) region. The conversion efficiency of chiral structure can reach up to 37.33/lambda, which is comparable with three-dimensional chiral structure made of metal due to the unique optoelectronic properties of graphene. The transmission asymmetry of complementary chiral meta-material originating from the high order plasmonic resonance can be tuned from 0.049% to 3.504% by changing Fermi energy, and the asymmetry can also be enhanced via geometrical optimization. This work raises the prospect of switchable, compact, and on-chip THz polarized devices with graphene materials. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：305 / 313

页数：9

共 42 条

[1] A perfect absorber made of a graphene micro-ribbon metamaterial [J].