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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 27, Iss. 6 — Jun. 1, 2010
  • pp: 1432–1441

Surface plasmon polaritons locally excited on the ridges of metallic gratings

B. Wang and P. Lalanne  »View Author Affiliations


JOSA A, Vol. 27, Issue 6, pp. 1432-1441 (2010)
http://dx.doi.org/10.1364/JOSAA.27.001432


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Abstract

With the perspective to achieve an in-depth understanding of metallic periodic surfaces, we study the surface plasmon polaritons that are locally excited on the ridges (between the indentations) of metallic lamellar gratings composed of slits or grooves. An approximate model and fully vectorial computational results show that the normalized excitation rate is rather small for slit arrays ( 10 at maximum) and is surprisingly weakly dependent on the metal permittivity. Additionally, the analysis is supported by an intuitive microscopic model that shines new light on the role of surface plasmons in the transmission and resonance anomalies of periodic metallic surfaces.

© 2010 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(240.6680) Optics at surfaces : Surface plasmons
(290.0290) Scattering : Scattering
(310.6860) Thin films : Thin films, optical properties

ToC Category:
Diffraction and Gratings

History
Original Manuscript: February 17, 2010
Revised Manuscript: April 27, 2010
Manuscript Accepted: April 27, 2010
Published: May 21, 2010

Citation
B. Wang and P. Lalanne, "Surface plasmon polaritons locally excited on the ridges of metallic gratings," J. Opt. Soc. Am. A 27, 1432-1441 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-6-1432

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