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Lattice density effect on the negative refractive index of a uniaxial metamaterial

Published online by Cambridge University Press:  15 March 2011

Claudio Amabile  and
Enrico Prati
Claudio Amabile
Affiliation:
Laboratorio Nazionale Materiali e Dispositivi per la Microelettronica, Istituto Nazionale per la Fisica della Materia, Via Olivetti 2, I-20041 Agrate Brianza, Italy
Enrico Prati
Affiliation:
Laboratorio Nazionale Materiali e Dispositivi per la Microelettronica, Istituto Nazionale per la Fisica della Materia, Via Olivetti 2, I-20041 Agrate Brianza, Italy
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Abstract

Negative refractive index materials tuned at n = -1 are believed to realize perfect lensing of real and evanescent modes. Metamaterials are the natural candidates to realize negative refractive index by the inversion of the effective dielectric permittiviy and magnetic permeability. The effect of the density on the tuning in the proximity of n = -1 is studied in order to find viable solutions to the issue of discretization of the lattice which correspondingly produces steps in the electromagnetic parameters of metamaterials. We study the microwave frequency negative refractive index of a metamaterial as a function of the density of the lattice period. The negative refractive index is realized by means of a waveguide filled with a split ring resonator lattice, exploited below the cut off frequency of the waveguide. We discuss the pass-band behaviour and the collective effects on the negative refractive index.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1223 , 2009 , 1223-EE02-05
Copyright
Copyright © Materials Research Society 2010

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References

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