Nonradiative dielectric waveguides employing metamaterial media are studied with the aim of obtaining unimodal surface-wave propagation for the operating low-loss LSM01 mode. Homogeneous isotropic -negative media are considered, with a plasma-like frequencydependent relative permittivity. The use of such media allows for obtaining the desired unimodal propagation in suitable frequency ranges, provided that the metamaterial slab thickness and the metal-plate spacing are sufficiently small. Parametric analyses are performed to determine the attainable frequency bandwidths.
Baccarelli, P., Galli, A. (2006). Unimodal surface-wave propagation in metamaterial nonradiative dielectric waveguides. MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 48(12), 2557-2560 [10.1002/mop.22000].