欢迎访问《空军工程大学学报》官方网站!

咨询热线:029-84786242 RSS EMAIL-ALERT
基于迂回相位和几何相位复合的散射调控超表面
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

TN826

基金项目:

国家自然科学基金(61971435)


Manipulating Scatterings of Electromagnetic Waves Using Metasurfaces Based on Combinations of Detour Phase and Geometric Phase
Author:
Affiliation:

Fund Project:

  • 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:

    提出了一种基于迂回相位和几何相位复合的电磁散射调控超表面设计方法,以实现不同入射角下对电磁波的独立调控。作为设计实例,采用能够实现宽带极化转换的开口谐振环(SRR)作为超表面结构单元,通过移动和旋转SRR同时引入迂回相位和几何相位,构成超表面反射相位设计方案。当电磁波垂直入射到超表面时,几何相位设计使得散射波分裂为两束,实现了分束功能;斜入射时,大部分散射波被引导至-1阶衍射通道,通过迂回相位设计实现了波束偏折功能。仿真和测试结果均验证了其良好的散射波束调控性能。基于几何相位和迂回相位的散射调控超表面设计方法丰富了超表面操纵电磁波的自由度,并可进一步与传输相位、共振相位等复合推广到全空间散射波束调控超表面设计。

    Abstract:

    Traditional meta-surfaces generally utilize propagation phase, geometric phase or their combinations for realizing manipulating scatterings of electromagnetic (EM) waves, and are mostly in the light of normal incidence. When incident EM waves become oblique, the performance of manipulating EM waves will become worse due to impedance mismatch, especially for large incidence angles. Fortunately, detour phase provides controlling obliquely incident EM waves with an alternative method, which can be introduced by moving meta-atoms from their original periodic lattices instead of changing the structure parameters or rotating the meta-atoms. This paper proposes a design strategy of independently manipulating EM waves under different incidence angles based on the combination of detour phase and geometric phase. As a proof-of-principle, a split ring resonator (SRR) is chosen as the meta-atom, which can achieve broadband polarization conversion. The meta-surface is formed by shifting and rotating the SRR meta-atoms to simultaneously introduce detour phase and geometric phase. When EM waves are incident normally upon the meta-surface, the scattered waves are split into two beams due to the geometric phase design. While under oblique incidence, most scattered waves are funneled into the -1st diffraction order and then are deflected by the detour phase design. Both the simulated and measured results show excellent performances. This method enriches the degree of freedom to manipulate EM waves using meta-surfaces and can be extended to full-space beam engineering by further combining with propagation phase, resonance phase, etc.

    参考文献
    相似文献
    引证文献
引用本文

张忠涛,王甲富*,翟伊鹏,楚遵天,贾宇翔,朱瑞超.基于迂回相位和几何相位复合的散射调控超表面[J].空军工程大学学报,2021,22(6):18-24

复制
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:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2022-01-30
  • 出版日期: