Symmetry breaking in a plasmonic metamaterial at optical wavelength.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 18578551.
- Also identified by DOI 10.1021/nl0805559.
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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.
Medical subject headings
- Gold