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Observation of slow-light in a metamaterials waveguide at microwave frequencies

We report an experimental observation of slow-light in the GHz microwave regime utilizing the mechanism of the degeneracy of forward and backward waves in a planar waveguide consisting of a dielectric core cladded by single-negative metamaterial. The metamaterial cladding consists of periodic arrays of metallic split-ring resonators, exhibiting an effective negative permeability. Group delay dispersions obtained from pulsed measurements are in complete agreement with theoretical predictions.

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