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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campilo
  • Vol. 32, Iss. 17 — Sep. 1, 2007
  • pp: 2535–2537

Surface plasmon interference excited by tightly focused laser beams

A. Bouhelier, F. Ignatovich, A. Bruyant, C. Huang, G. Colas des Francs, J.-C. Weeber, A. Dereux, G. P. Wiederrecht, and L. Novotny  »View Author Affiliations


Optics Letters, Vol. 32, Issue 17, pp. 2535-2537 (2007)
http://dx.doi.org/10.1364/OL.32.002535


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Abstract

We show that interfering surface plasmon polaritons can be excited with a focused laser beam at normal incidence to a plane metal film. No protrusions or holes are needed in this excitation scheme. Depending on the axial position of the focus, the intensity distribution on the metal surface is either dominated by interferences between counterpropagating plasmons or by a two-lobe pattern characteristic of localized surface plasmon excitation. Our experiments can be accurately explained by use of the angular spectrum representation and provide a simple means for locally exciting standing surface plasmon polaritons.

© 2007 Optical Society of America

OCIS Codes
(180.5810) Microscopy : Scanning microscopy
(240.6680) Optics at surfaces : Surface plasmons
(310.6860) Thin films : Thin films, optical properties

ToC Category:
Optics at Surfaces

History
Original Manuscript: May 2, 2007
Revised Manuscript: July 23, 2007
Manuscript Accepted: July 23, 2007
Published: August 20, 2007

Citation
A. Bouhelier, F. Ignatovich, A. Bruyant, C. Huang, G. Colas des Francs, J.-C. Weeber, A. Dereux, G. P. Wiederrecht, and L. Novotny, "Surface plasmon interference excited by tightly focused laser beams," Opt. Lett. 32, 2535-2537 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-17-2535

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