Optical metamaterials with different metals

TitleOptical metamaterials with different metals
Publication TypeJournal Article
Year of Publication2012
AuthorsShen NH, Koschny T, Kafesaki M, Soukoulis CM
Journal TitlePhysical Review B
Volume85
Pages075120
Date Published02
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000300419800003
Keywordscloak, frequencies, hyperlens, negative-index metamaterials, plasmonic metamaterials, refractive-index, wavelengths
Abstract

We investigate the influence of different metals on the electromagnetic response of fishnet metamaterials in the optical regime. We found, instead of using a Drude model, metals with a dielectric function from experimentally measured data should be applied to correctly predict the behavior of optical metamaterials. Through comparison of the performance for fishnet metamaterials made with different metals (i.e., gold, copper, and silver), we found silver is the best choice for the metallic parts compared to other metals, because silver allows for the strongest negative-permeability resonance and, hence, for optical fishnet metamaterials with a high figure-of-merit. Our study offers a valuable reference in the designs for optical metamaterials with optimized properties.

URL<Go to ISI>://WOS:000300419800003
DOI10.1103/PhysRevB.85.075120
Alternate JournalPhys. Rev. B