基于石墨烯的太赫兹可调编码超表面
DOI:
作者:
作者单位:

南京邮电大学

作者简介:

通讯作者:

中图分类号:

O436

基金项目:

国家自然科学基金项目、江苏省自然科学基金和横向课题


Terahertz tunable coding metasurface base on graphene
Author:
Affiliation:

Nanjing University of Posts & Telecommunications

Fund Project:

The National Natural Science Foundation of China,the Natural Science Foundation of Jiangsu Province and the Horizontal Program

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    基于几何相位原理,引入石墨烯材料,设计了一种反射型太赫兹可调编码超表面单元结构,其由顶层的双开口?形金属结构、嵌入双层石墨烯结构的聚酰亚胺基底和金属反射层组成,而通过调控双层石墨烯结构的费米能级可使其反射幅度动态可调。根据单元的幅度可调特性,设计出具有旋转相位梯度特征的编码序列,产生了幅度可调的涡旋光束。与编码超表面的傅里叶卷积运算相结合,进一步设计能够出射双涡旋光束的编码超表面,大大提升了对涡旋光束数目和散射角度的可控性。其在太赫兹高速通信系统中具有潜在的应用价值。

    Abstract:

    In order to manipulate terahertz wave flexibly, a terahertz tunable coding metasurface unit cell structure is designed based on the Pancharatnam-Berry phase principle and the use of graphene material. It consists of a double-open ?-shaped metal structure on the top layer, a polyimide substrate embedded in a double-layer graphene structure and a metal layer, and its reflection amplitude can be dynamically tuned by modulating the Fermi energy of the bilayer graphene structure. Based on its amplitude tunable characteristic, a coding sequence with rotational phase gradient characteristic is designed to produce an amplitude tunable vortex beam. Combined with the Fourier convolution theory, a coding metasurface capable of emitting a double vortex beam is designed ulteriorly, and the maneuverability of vortex beam numbers and scattering angles is greatly improved in this way. The devices designed have potential application value in terahertz high-speed communication system.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2023-03-01
  • 最后修改日期:2023-05-09
  • 录用日期:2023-05-16
  • 在线发布日期:
  • 出版日期: