English

应用科学学报 ›› 2012, Vol. 30 ›› Issue (4): 369-373.doi: 10.3969/j.issn.0255-8297.2012.04.007

• 电子技术 • 上一篇    下一篇

非对称结构平面电磁超材料的微波特性研究

史金辉， 刘冉， 余胜武， 朱正， 关春颖， 王政平   

  1. 哈尔滨工程大学理学院，哈尔滨 150001
  • 收稿日期:2011-09-08 修回日期:2011-10-26 出版日期:2012-07-23 发布日期:2012-07-26
  • 作者简介:史金辉，博士，副教授，研究方向：电磁超材料研究与应用，E-mail: shijinhui@hrbeu.edu.cn
  • 基金资助:

    国家自然科学基金(No.11104043)； 黑龙江省自然科学基金(No.LC201006)； 哈尔滨市青年科技创新人员专项基金
    (No.2012RFLXG030)；中央高校基本科研业务费专项资金资助

Microwave Response of Planar Metamaterial Structured by Asymmetrically Split Rings

SHI Jin-hui, LIU Ran, YU Sheng-wu, ZHU Zheng, GUAN Chun-ying   

  1. College of Sciences, Harbin Engineering University, Harbin 150001, China
  • Received:2011-09-08 Revised:2011-10-26 Online:2012-07-23 Published:2012-07-26

PDF

1676

被引次数

2

摘要：

利用有限元法研究了非对称平面电磁超材料的Fano 谐振. 给出了谐振频率处的表面激发电流分布，利用Fano 公式对非对称电磁超材料的透射谱进行拟合. 逐一分析单一金属环的电磁响应，发现非对称金属弧之间的耦合作用导致了Fano 谐振. 分析了结构参量对Fano 谐振性能的影响，并研究了入射电磁波偏振旋转角对Fano 谐振的影响. 结果表明，旋转偏振角是实现metamaterial 性能调谐的方式之一.

关键词: 电磁超材料, 开口谐振环, Fano谐振, 表面电流, 透射

Abstract:

 In the paper, Fano resonances in a planar metamaterial with asymmetrically split rings are investigated
using the finite element method. Excited surface current distributions are presented. The transmission
spectrum of the metamaterial is also fitted based on the Fano formula. The electromagnetic response of each
metallic ring is studied individually. It is found that the Fano resonances are due to the coupling between
two asymmetric metallic resonators. Further, effects of the structural parameters on the Fano resonance are
analyzed. Finally, dependence of Fano resonance on polarization rotation angles of the incident electromagnetic
waves is studied. Simulation results reveal that polarization rotation angles of incident electromagnetic waves
provides an easy approach of tuning the performance of metamaterials.

Key words: metamaterials, split-ring resonator, Fano resonance, surface current, transmission