Phys. Rev. B 74, 073408 (2006) [4 pages]Resonant absorption of electromagnetic fields by surface plasmons buried in a multilayered plasmonic nanostructureReceived 30 June 2006; published 22 August 2006 The optical reflectivity of a metal-dielectric-metal microcavity in which the upper layer is periodically perforated by narrow slits is explored. Complete characterization of the observed modes in terms of their resonant electromagnetic fields is achieved by comparison of the experimental data to the predictions of a finite-element model. In particular, we demonstrate that the slits provide efficient diffractive coupling to a surface plasmon mode buried within the microcavity whose propagation is strongly confined to the dielectric layer. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.74.073408
DOI:
10.1103/PhysRevB.74.073408
PACS:
78.20.Ci, 42.25.Bs, 42.79.Dj, 73.20.Mf
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