Bound terahertz waves on meta-surfaces and active metamaterials

We present a numerical and experimental study of the dispersion relation and propagation properties of bound surface waves on a meta-surface consisting of a single layer array of split ring resonators. Furthermore, we introduce an analytic model that allows one to determine the influence of nonlinear effects on the temporal dynamics of a coupled system composed of a split ring resonator metamaterial and a two-level atomic gain medium.