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Experimental Verification of Low-Loss Broadband Anomalous Material Dispersion at Microwaves

Morgado, T. A. ; Marcos, J. ; Costa, J. ; Costa, J.R. ; Fernandes, C. A. ; Silveirinha, M. G.

Experimental Verification of Low-Loss Broadband Anomalous Material Dispersion at Microwaves, Proc Metamorphose International Congress on Advanced Electromagnetic Materials in Microwaves and Optics - METAMATERIALS, Copenhagen, Denmark, Vol. -, pp. - - -, August, 2014.

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Abstract
Some time ago [Phys. Rev. Lett. 102, 193903 (2009)] it was theoretically predicted that a metamaterial formed by an array of nonconnected crossed metallic wires may have low-loss broadband anomalous dispersion such that the refractive index decreases with frequency. Here we report the first experimental demonstration of this remarkable property, showing that differently from conventional glass prisms the transmission angle of a beam refracted by a metamaterial prism decreases with frequency.