Symmetry breaking in a plasmonic metamaterial at optical wavelength

André Christ, Olivier J.F. Martin, Yasin Ekinci, Nikolai A. Gippius, Sergei G. Tikhodeev

Research output: Contribution to journalArticlepeer-review

211 Citations (Scopus)

Abstract

We numerically study the effect of structural asymmetry in a plasmonic metamaterial made from gold nanowires. It is reported that optically inactive (i.e., optically dark) particle plasmon modes of the symmetric wire lattice are immediately coupled to the radiation field, when a broken structural symmetry is introduced. Such higher order plasmon resonances are characterized by their subradiant nature. They generally reveal long lifetimes and distinct absorption losses. It is shown that the near-field interaction strongly determines these modes.

Original languageEnglish
Pages (from-to)2171-2175
Number of pages5
JournalNano Letters
Volume8
Issue number8
DOIs
Publication statusPublished - Aug 2008
Externally publishedYes

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