Surface-wave propagation along a metamaterial slab

Surface-wave propagation along a metamaterial slab with negative permittivity and permeability is analyzed. The dispersion relations are determined for the TM and TE (odd and even) modes. The Brillouin diagrams are drawn and show that, for odd modes after cutoff, there is an initial frequency range for which there are two possible propagation coefficients. All the even modes exhibit the same behaviour except the first one. In this case a band-pass region appears, suggesting that the device could be used as a filter. (C) 2003 Wiley Periodicals, Inc.