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Near-field resonance at far-field-induced transparency in diffractive arrays of plasmonic nanorods

S. R. K. Rodriguez, O. T. A. Janssen, G. Lozano, A. Omari, Z. Hens, and J. Gómez Rivas

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Abstract

We numerically demonstrate that a periodic array of metallic nanorods sustains a maximum near-field enhancement and a far field (FF)-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 FF scattering and simultaneously enhanced local fields.

© 2013 Optical Society of America

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