Design of matched zero-index metamaterials using nonmagnetic inclusions in epsilon-near-zero media

Mário Silveirinha and Nader Engheta

Phys. Rev. B 75, 075119 – Published 27 February 2007

Abstract

In this work, we study the electrodynamics of metamaterials that consist of resonant non-magnetic inclusions embedded in an epsilon-near-zero (ENZ) host medium. It is shown that the inclusions can be designed in such a way that both the effective permittivity and permeability of the composite structure are simultaneously zero. Two different metamaterial configurations are studied and analyzed in detail. For a particular class of problems, it is analytically proven that such matched zero-index metamaterials may help improving the transmission through a waveguide bend, and that the scattering parameters may be completely independent of the specific arrangement of the inclusions and of the granularity of the crystal. The proposed concepts are numerically demonstrated at microwaves with a metamaterial realistic realization based on an artificial plasma.

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Received 25 August 2006

DOI:https://doi.org/10.1103/PhysRevB.75.075119

Authors & Affiliations

Mário Silveirinha^1,2 and Nader Engheta^1,*

¹Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
²Electrical Engineering Department–Instituto de Telecomunicações, Universidade de Coimbra, Portugal

^*Author to whom correspondence should be addressed. Electronic address: engheta@ee.upenn.edu

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Issue

Vol. 75, Iss. 7 — 15 February 2007

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Physical Review B

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