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Proceedings Paper

Transmission properties of material with relative permittivity and permeability close to -1
Author(s): John Rhodes Thomas; Akira Ishimaru
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Paper Abstract

J.B. Pendry has shown that a layer of material with relative permittivity and relative permeability both equal to -1 behaves as a perfect two-dimensional lens for an object closer than the thickness of the layer. We examine results for transmission through a material with relative constants close to -1. For a passive material, the imaginary parts of relative permittivity and permeability are negative (the engineer's convention). We treat the transmission of a delta-function line source through a layer. This source includes all spatial wave numbers. The longitudinal component kz of the propagation vector normal to the surface assumes values that are negative real and imaginary for the evanescent modes. Transmission in a medium that has both relative permittivity and permeability equal to -1 amplifies the imaginary kz terms and, thus, restores the evanescent waves and bypasses the usual diffraction limit of an ordinary lens. We show that small deviations from the perfect lens material cause a change from amplification to attenuation of these evanescent waves and thus limit the degree of improvement of an image.

Paper Details

Date Published: 24 June 2002
PDF: 9 pages
Proc. SPIE 4806, Complex Mediums III: Beyond Linear Isotropic Dielectrics, (24 June 2002); doi: 10.1117/12.472981
Show Author Affiliations
John Rhodes Thomas, Univ. of Washington (United States)
Akira Ishimaru, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 4806:
Complex Mediums III: Beyond Linear Isotropic Dielectrics
Akhlesh Lakhtakia; Graeme Dewar; Martin W. McCall, Editor(s)

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