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
Original Manuscript: December 10, 2012
Manuscript Accepted: February 28, 2013
Published: April 3, 2013
S. R. K. Rodriguez, O. T. A. Janssen, G. Lozano, A. Omari, Z. Hens, and J. Gómez Rivas, "Near-field resonance at far-field-induced transparency in diffractive arrays of plasmonic nanorods," Opt. Lett. 38, 1238-1240 (2013)