Terahertz broadband tunable reflective cross-polarization convertor based on complementary cross-shaped graphene metasurface

被引：84

作者：

Cheng, Yongzhi ^{[1
]}

Zhu, Xuzheng ^{[1
]}

Li, Jun ^{[1
]}

Chen, Fu ^{[1
]}

Luo, Hui ^{[1
]}

Wu, Ling ^{[2
]}

机构：

[1] Wuhan Univ Sci & Technol, Sch Informat Sci & Engn, Wuhan 430081, Hubei, Peoples R China

[2] Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2021年 / 134卷

基金：

中国国家自然科学基金;

关键词：

Metasurface; Graphene sheet; Broadband; Cross-polarization conversion; PERFECT METAMATERIAL ABSORBER; MULTIBAND; AL;

D O I：

10.1016/j.physe.2021.114893

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work, a broadband tunable reflective polarization convertor using a single layer complementary-cross-shaped (CCS) graphene metasurface was proposed and investigated numerically in terahertz (THz) region. The electric property of CCS graphene could be flexibly tuned through the Fermi energy level (Ef). When Ef = 0.9 eV, the proposed graphene metasurface can realize a relative high polarization conversion ratio (PCR) of over 80% from 2.15 THz to 4 THz with a relative bandwidth of 60.16%. Furthermore, the PCR peak can reach up to as high as 99%, 99.5% and 91.5% at 2.4 THz, 3.4 THz and 3.96 THz, respectively. The physical origins of this polarization conversion properties are turned out to be supported by field distributions and Fabry-Perot interference theory. Furthermore, the broadband polarization conversion properties will be regulated by varying the Fermi energy level.

引用

页数：6