Metamaterials for THz and optical applications

Tunable THz metamaterials have been designed and modeled. Three different structures are under investigations: array of U-shaped planar resonators and metal-dielectric-metal patch array with voltage controlled cantilevers and dielectric resonators based structure with disturbed Mie resonance. All structures exhibit efficient control of electromagnetic response. An optical superlens based on a coupled pair of 2-D arrays of plasmonic nano-ellipsoids is presented and analyzed. The superlens is capable of restoring sub-wavelength features of an object for s- and p-polarization of light. Simulations revealed sub-wavelength resolution at a distance of nearly 1.4λ_eff between the source and the image plane.