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A New Perspective on Plasmonics: Confinement and Propagation Length of Surface Plasmons for Different Materials and Geometries

TitleA New Perspective on Plasmonics: Confinement and Propagation Length of Surface Plasmons for Different Materials and Geometries
Publication TypeJournal Article
Year of Publication2016
AuthorsDastmalchi, B, Tassin, P, Koschny, T, Soukoulis, CM
JournalAdvanced Optical Materials
Volume4
Pagination177-184
Date Published01
Type of ArticleArticle
ISBN Number2195-1071
Accession NumberWOS:000371268300019
Keywordsexcitation, Graphene, light, metals, nano-optics, polaritons, silver, Spectroscopy, subwavelength optics, wave-guides
Abstract

Surface-plasmon polaritons are electromagnetic waves propagating on the surface of a metal. Thanks to subwavelength confinement, they can concentrate optical energy on the micrometer or even nanometer scale, enabling new applications in bio-sensing, optical interconnects, and nonlinear optics, where small footprint and strong field concentration are essential. The major obstacle in developing plasmonic applications is dissipative loss, which limits the propagation length of surface plasmons and broadens the bandwidth of surface-plasmon resonances. Here, a new analysis of plasmonic materials and geometries is presented which fully considers the tradeoff between propagation length and degree of confinement. It is based on a two-dimensional analysis of two independent figures of merit and the analysis is applied to relevant plasmonic materials, e.g., noble metals, aluminum, silicon carbide, doped semiconductors, graphene, etc. The analysis provides guidance on how to improve the performance of any particular plasmonic application and substantially eases the selection of the plasmonic material.

DOI10.1002/adom.201500446
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Metamaterials