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Negative Refraction by a Hyperbolic Metamaterial formed by Helical-Shaped Wires

Morgado, T. A. ; Maslovski , S. ; Silveirinha, M. G.

Negative Refraction by a Hyperbolic Metamaterial formed by Helical-Shaped Wires, Proc Metamorphose International Congress on Advanced Electromagnetic Materials in Microwaves and Optics - METAMATERIALS, St. Petersburg, Russia, Vol. -, pp. - - -, September, 2012.

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Abstract
We demonstrate that a racemic array of helical-shaped metallic wires may behave as a local uniaxial Epsilon-Negative (ENG) material. It is shown that by increasing the geometrical inductance of the wires it is possible to nearly suppress the spatial dispersion effects that are inherent to wire media at low frequencies, which in turn favors the emergence of negative refraction.