Magnetized spiral chains of plasmonic ellipsoids for one-way optical waveguides

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Abstract

When a linear chain of plasmonic nanoparticles is subject to longitudinal magnetic field, it exhibits optical Faraday rotation. If the magnetized nanoparticles are plasmonic ellipsoids arranged as a spiral chain, the interplay between the Faraday rotation and the geometrical spiral rotation (structural chirality) can strongly enhance nonreciprocity. This interplay forms a waveguide that permits one-way propagation only, within four disjoint frequency bands, two bands for each direction.

Original languageEnglish
Article number233904
JournalPhysical Review Letters
Volume105
Issue number23
DOIs
StatePublished - 1 Dec 2010

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