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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry Van Driel
  • Vol. 26, Iss. 6 — Jun. 1, 2009
  • pp: 1228–1237

Surface plasmon polaritons on deep, narrow-ridged rectangular gratings

M. R. Gadsdon, I. R. Hooper, A. P. Hibbins, and J. R. Sambles  »View Author Affiliations


JOSA B, Vol. 26, Issue 6, pp. 1228-1237 (2009)
http://dx.doi.org/10.1364/JOSAB.26.001228


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Abstract

The dispersion diagrams of surface plasmon polaritons have been calculated for rectangular gratings, with very narrow wires, of varying depths. For gratings with a moderate height a family of vertical-standing-wave resonances may be excited, which consist of surface plasmons, oscillating on either vertical surface, coupling together through the metal wires. These modes evolve similarly to the manner in which shallow-grating surface-plasmon dispersion curves evolve into cavity modes in the grooves of the structure. However, on further increase in grating height these vertical standing waves evolve into a second resonant feature, which is independent of yet further increases in height. This new mode is shown to be equivalent to the resonances found on infinite multilayer metal/dielectric structures illuminated at normal incidence.

© 2009 Optical Society of America

OCIS Codes
(230.4170) Optical devices : Multilayers
(240.6680) Optics at surfaces : Surface plasmons
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Optics at Surfaces

History
Original Manuscript: January 6, 2009
Revised Manuscript: April 16, 2009
Manuscript Accepted: April 17, 2009
Published: May 19, 2009

Citation
M. R. Gadsdon, I. R. Hooper, A. P. Hibbins, and J. R. Sambles, "Surface plasmon polaritons on deep, narrow-ridged rectangular gratings," J. Opt. Soc. Am. B 26, 1228-1237 (2009)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-26-6-1228

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