On-Demand Surface Electromagnetic Waves at Boundaries of Biansotropic Materials

We extend the method of the inverse problem for finding the effective parameters of materials that propagate desired plane waves [Mulkey, Dillies, Durach, Opt. Lett., 43, 1226 (2018)] to design boundaries of bianisotropic materials (BAM) which propagate desired surface electromagnetic waves (SEWs). We show that an arbitrary choice of 3 SEWs which includes 2 inhomogeneous waves in the BAM with arbitrary polarizations provides the effective medium parameters of the BAM-vacuum interface that supports these waves. We discuss how a selection of SEWs for this SEW inverse problem affects the entire spectrum of SEWs propagating at the BAM-vacuum boundary.