Negative phase advance in polarization independent, multi-layer negative-index metamaterials

Date
2008
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Source Title
Optics Express
Print ISSN
1094-4087
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Publisher
Optical Society of American (OSA)
Volume
16
Issue
12
Pages
8835 - 8844
Language
English
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Abstract

We demonstrate a polarization independent negative-index metamaterial (NIM) at microwave frequencies. Transmission measurements and simulations predict a left-handed transmission band with negative permittivity and negative permeability. A negative-index is verified by using the retrieval procedure. Effective parameters of single-layer and twolayer NIMs are shown to be different. Negative phase advance is verified within the negative-index regime by measuring the phase shift between different sized negative-index metamaterials. Backward wave propagation is observed in the numerical simulations at frequencies where the phase advance is negative. ©2008 Optical Society of America.

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