Terajet from 3D anisotropic artificial metamaterial

A dielectric anisotropic metamaterial-based cuboid (metacuboid) for terajet formation are proposed. Artificial metamaterials based on metallic photonic crystal with high metal filling factor and perforated dielectric are discussed. The optical responses of meta-coboids are described by the effective medium approximation, in which the dielectric permittivity tensor is diagonal with different values of permittivities. The metacuboids has been designed to operate as a focusing device producing a terajet in the homogenization regime. The dispersions of effective permittivity formed by different types of structures were analytically obtained for both metamaterial and photonic crystal regimes. The terajet formation and beam focusing with birefringer effect were numerically and experimentally shown.