Waves in a Slab Uniaxial BW Medium

摘要

Media with negative permittivity and/or parameters have been recently labeled as BW-media because of their capability of supporting backward waves. Methods for construction composite materials realizing such media (also called metamaterials) have also been recently suggested. The present analysis considers guidance of waves in a slab of uniaxially anisotropic BW medium with at least one of the four medium parameters negative. It is shown that there exists odd and even TE and TM modes in such a slab which may carry energy in opposite directions inside and outside the slab with backward waves inside the slab.