大学物理 ›› 2009, Vol. 28 ›› Issue (6): 43-43.

• 著者文摘 • 上一篇    下一篇

利用电磁左手材料调控电磁波的偏振反转

查扬 汪人甫 俞熹   

  1. 复旦大学物理系,上海200433
  • 出版日期:2009-06-20 发布日期:2009-06-20

Manipulating and measuring polarizations conversion of electromagnetic wave by anisotropic metamaterials

  • Online:2009-06-20 Published:2009-06-20

摘要: 通过各向异性的电磁介质板的反射,电磁波的偏振状态可以被任意地调节,在特定的条件下甚至可以完全反转.本文在微波测量系统的基础上设计了一个测量偏振反转的实验,在特定的频率观测到了偏振反转的极大值.另外还提出了一个提高偏振反转率的方案并通过实验验证了其有效性.通过转移矩阵方法计算得到了偏振反转的理论结果并与实验结果进行了对比.

关键词: 电磁左手材料, 各向异性, 偏振反转

Abstract: Reflected from anisotropic metamateiral slab, polarization states of electromagnetic wave can be ma- nipulated with great freedom, and may have complete polarization conversion under certain conditions. In this paper we present our designing and performing of an experiment aimed at measuring the polarization conversion of electro- magnetic wave, based on the laboratory's microwave system. We show the result of our experiment as we found con- siderable polarization conversion at certain frequencies. We also purpose a new approach to enhance the polarization conversion ratio (PCR) and have testified it through experiment. Numerical simulations are employed to compare with the experimental result.

Key words: metamaterial, anisotropy, polarization conversion

中图分类号: 

  • O441.4