Departmental Papers (ESE)

Abstract

Here, we analyze the transverse-magnetic (TM) wave interaction with a pair of slabs, one being an epsilon-negative (ENG) layer in which the real part of permittivity is assumed to be negative while its permeability has positive real part, and the other being a mu-negative (MNG) layer that has the real part of its permeability negative but its permittivity has positive real part. Although wave interaction with each slab by itself has predictable features, we show that the juxtaposition and pairing of such ENG and MNG slabs may, under certain conditions, lead to some unusual features, such as resonance, complete tunneling, zero reflection and transparency. The field distributions inside and outside such paired slabs are analyzed, and the Poynting vector distributions in such structures are studied. Using equivalent transmission-line models, we obtain the conditions for the resonance, complete tunneling and transparency, and we justify and explain the field behavior in these resonant paired structures. Salient features of the tunneling conditions, such as the roles of material parameters, slab thicknesses, dissipation, and angle of incidence are discussed. The analogy and correspondence between the ENG-MNG pair and the pair of a slab of conventional material juxtaposed with a “double-negative” medium is also discussed. Finally, a conceptual idea for a potential application of such a “matched” lossless ENG-MNG pair in “ideal” image displacement and image reconstruction is proposed.

Document Type

Journal Article

Date of this Version

10-1-2003

Comments



NOTE: At the time of publication, author Andrea Alù was affiliated with the University of Roma Tre. As of September 2006, she is a staff member in the Department of Electrical and Systems Engineering at the University of Pennsylvania. Copyright © 2003 IEEE. Reprinted from IEEE Transactions on Antennas and Propagation, Vol. 51, No. 10, October 2003. Publisher URL: http://dx.doi.org/10.1109/TAP.2003.817553

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Keywords

Double-negative material, left-handed material, metamaterial, negative index of refraction, negative permeability, negative permittivity, negative index material, transparency, tunneling, zero reflection

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Date Posted: 14 October 2004

This document has been peer reviewed.