Departmental Papers (ESE)

Document Type

Journal Article

Date of this Version

March 2007

Comments

Reprinted from Physical Review E, Volume 75, Article 036603, March 2007, 16 pages.
Publisher URL: http://dx.doi.org/10.1103/PhysRevE.75.036603

Abstract

In this work, we assess theoretically the physical response of metamaterial composite structures that emulate the behavior of negative-permittivity materials in certain relevant setups. The metamaterials under analysis consist of metallic parallel-plate implants embedded in a dielectric host in a two-dimensional geometry. Simple design rules and formulas are presented, fully considering the effect and consequences of excitation of higher-order diffraction modes at the metamaterial-dielectric interface. Following the ideas of transparency and cloaking developed by us [Alù and Engheta, Phys. Rev. E 72, 016623 (2005)], we demonstrate, analytically and numerically, that it is possible in this way to design metamaterial cloaks that significantly reduce the total scattering cross section of a given two-dimensional dielectric obstacle in some frequency band. This effect, which may be realized in a feasible way, may find interesting applications in electromagnetic cloaking, total scattering cross section reduction, and noninvasive probing.

Keywords

metamaterials, permittivity, dielectric materials, composite material interfaces, light diffraction, transparency

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Date Posted: 24 May 2007

This document has been peer reviewed.