Abstract

A three-dimensional, isotropic metamaterial with double-negative behavior is proposed. The material comprises metallic spheres coated in a high-permittivity shell and dispersed in a host medium. In stark contrast to other Mie resonance-based metamaterial designs, ours relies on the metallic phase behaving as a near-perfect electric conductor, rather than a plasmonic. As such, by tuning the particle dimensions, double-negative behavior can be achieved at any frequency where one can find high-conductivity and high-permittivity materials.

© 2014 Optical Society of America

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