title: Double-negative metamaterial from conducting spheres with a high-permittivity shell.
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.
authors: Scott
authors: S
authors: Townsend
authors: Shiwei
authors: S
authors: Zhou
authors: Qing
authors: Q
authors: Li