A transparent 90 degree polarization rotator by combining chirality and electromagnetic wave tunneling

Date
2012-02-03
Advisor
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Source Title
Applied Physics Letters
Print ISSN
0003-6951
Electronic ISSN
Publisher
AIP Publishing
Volume
100
Issue
5
Pages
051909-1 - 051909-4
Language
English
Type
Article
Journal Title
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Abstract

A three-layer chiral metamaterial is constructed by using two layers of four mutually rotated resonators and a subwavelength mesh sandwiched symmetrically between these layers. The resulting structure is an ultrathin, transparent, and polarization angle independent 90 degrees polarization rotator. Due to the electromagnetic tunneling effect exerted by the negative permittivity mesh, a cross-polarization conversion efficiency of 99% and 93% is achieved numerically and experimentally. The structure is modeled using the effective medium theory and then the transfer matrix method is applied to demonstrate the existence of the tunneling resonance theoretically.

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Keywords
Transmission, Permittivity, Metamaterial
Citation
Published Version (Please cite this version)