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Comparison of gold- and graphene-based resonant nanostructures for terahertz metamaterials and an ultrathin graphene-based modulator

TitleComparison of gold- and graphene-based resonant nanostructures for terahertz metamaterials and an ultrathin graphene-based modulator
Publication TypeJournal Article
Year of Publication2014
AuthorsShen, NH, Tassin, P, Koschny, T, Soukoulis, CM
JournalPhysical Review B
Volume90
Pagination115437
Date Published09
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000343756400008
Keywordsconductors, devices, infrared-spectroscopy, light, metals, plasmonics
Abstract

s huge reactive response derived from its large kinetic inductance allows for deeply subwavelength resonances, although its resonance strength is reduced due to higher dissipative loss damping and smaller dipole coupling. Nevertheless, tightly stacked graphene rings may provide for negative permeability and the electric dipole resonance of graphene meta-atoms turns out to be surprisingly strong. Based on these findings, we present a terahertz modulator based on a metamaterial with a multilayer stack of alternating patterned graphene sheets separated by dielectric spacers. Neighboring graphene flakes are biased against each other, resulting in modulation depths of over 75% at a transmission level of around 90%.

DOI10.1103/PhysRevB.90.115437
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Metamaterials