Single-Negative, Double-Negative, and Low-index Metamaterials and their Electromagnetic Applications

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metamaterials
permittivity
permeability
composite materials
resonators
waveguides
antennas
negative index material
negative refraction
Electromagnetics and Photonics
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Alù, Andrea
Erentok, A.
Ziolkowski, Richard W
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Metamaterials that are engineered media characterized by electromagnetic constitutive parameters with anomalous values may show counterintuitive properties in their interactions with electromagnetic waves. Here, we review some of the properties and potential applications we have recently presented in the technical literature: properties and applications in which plasmonic materials and metamaterials may be utilized to overcome some conventional physical limits. Resonances arising in electrically small regions of interface where these materials are paired with common materials are shown to be potentially attractive for this purpose in some electromagnetic problems, for instance, in guiding and radiating structures. The anomalous refractive properties at such "complementary" interfaces and the negative values of polarizability attainable in such materials are also shown to offer potentials for several applications.

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2007-02-01
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Copyright 2007 IEEE. Reprinted from IEEE Transactions on Antennas and Propagation Magazine, Volume 49, Issue 1, February 2007, pages 23-36. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Pennsylvania's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
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