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Proceedings Paper

Negative phase velocity composites employing magnetic hosts
Author(s): Graeme Dewar
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Paper Abstract

Materials having both a negative permittivity and a negative permeability allow the free propagation of electromagnetic waves with a negative phase velocity (NPV), i.e., the phase velocity is opposite the direction of energy propagation. An NPV material can be made with a lattice of fine wires cladded in nonmagnetoc insulation and embedded in a magnetic host. The wires give rise to the negative permittivity, the magnetic host supplies the negative permeability, and the nonmagnetic cladding minimizes the coupling between the wires and the magnetic host. This structure is so simple that it has the potential to be made small enough for NPV materials to operate in the far infrared. This presentation describes calculations developed to compare to experiments at microwave frequencies with cladded wires in ferrimagnetic hosts.

Paper Details

Date Published: 9 July 2003
PDF: 5 pages
Proc. SPIE 5218, Complex Mediums IV: Beyond Linear Isotropic Dielectrics, (9 July 2003); doi: 10.1117/12.506148
Show Author Affiliations
Graeme Dewar, Univ. of North Dakota (United States)


Published in SPIE Proceedings Vol. 5218:
Complex Mediums IV: Beyond Linear Isotropic Dielectrics
Martin W. McCall; Graeme Dewar, Editor(s)

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