Surface Waves along a Boundary of Single Negative Material

Masashi HOTTA  Mitsuo HANO  Ikuo AWAI  

IEICE TRANSACTIONS on Electronics   Vol.E88-C   No.2   pp.275-278
Publication Date: 2005/02/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
surface wave,  metamaterial,  negative permeability,  negative permittivity,  directional coupler,  

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Existence of a surface wave along the boundary between the semi-infinite materials, one of which is a free-space and the other is a material with either negative permeability or negative permittivity, is theoretically investigated. Surface waves exist in only limited combination of negative and positive signs of the material parameters. In addition, by analyzing the surface wave in a finite-thickness slab with negative permeability, its mode profile has been obtained for two different types of symmetry. From these results, the present paper predicts the possibility of a surface wave directional coupler based on a single slab transmission along its top and bottom surfaces.