Document Type

Article

Publication Version

Published Version

Publication Date

2006

Journal or Book Title

Progress in Electromagnetics Research

Volume

65

First Page

103

Last Page

123

DOI

10.2528/PIER06081601

Abstract

The properties of a grounded dielectric slab with double negative (DNG) metamaterials are investigated in this paper. Dramatically different dispersion curves of evanescent surface modes (electromagnetic fields exponentially decay both in air and inside the slab) are observed. They are highly dependent on the medium parameters. As the counterpart of the improper complex leaky modes in a double positive (DPS) medium, the complex modes in a DNG medium are proved to be exclusively proper. They have exponentially decaying fields in the air region and are termed complex surface modes. It is found that there are an infinite number of complex surface modes and they cannot be suppressed. The Poynting vectors of complex surface modes are studied and it is proved that their integrals along the transverse direction are simply zero. The complete mode spectrum of the dielectric slab for both DPS and DNG media are tabled and compared. Surface wave suppression is discussed and its necessary and sufficient conditions are presented.

Comments

This article is from Progress in Electromagnetics Research 65 (2006): 103, doi: 10.2528/PIER06081601. Posted with permission.

Copyright Owner

Shu and Song

Language

en

File Format

application/pdf

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