Near-field resonance at far-field induced transparency in diffractive arrays of plasmonic nanorods
We numerically demonstrate that a periodic array of metallic nanorods sustains a maximum near-field enhancement and a far-field induced transparency at the same energy and in-plane momentum. The coupling of bright and dark plasmonic lattice resonances, and electromagnetic retardation along the nanorod length, are responsible for this effect. A standing wave with a quadrupolar field distribution is formed, giving rise to a collective suppression of far-field scattering and simultaneously enhanced local fields.
Rodriguez, S.R.K, Janssen, O.T.A, Lozano, G, Omari, A, Hens, Z, & Gómez Rivas, J. (2013). Near-field resonance at far-field induced transparency in diffractive arrays of plasmonic nanorods. Opt. Lett., 38(8), 1238–1240. doi:10.1364/OL.38.001238