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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 5 — Feb. 27, 2012
  • pp: 4893–4902

Directional excitation of surface plasmon polaritons via nanoslits under varied incidence observed using leakage radiation microscopy

Yannick Sonnefraud, Sarp Kerman, Giuliana Di Martino, Dang Yuan Lei, and Stefan A. Maier  »View Author Affiliations


Optics Express, Vol. 20, Issue 5, pp. 4893-4902 (2012)
http://dx.doi.org/10.1364/OE.20.004893


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Abstract

Surface Plasmon Polaritons (SPPs) are excited at the interface between a thin gold film and air via the illumination of nanoslits etched into the film. The coupling efficiency to the two propagation directions away from the slits is determined by leakage radiation microscopy, when the angle of incidence of the pump beam is changed from 0° to 20°. We find that preferential coupling of SPPs into one direction can be achieved for non-normal incidence in the case of single slits and slit pairs. The proportion of SPP excited into one direction can be in excess of 90%. We further provide a simple model of the process, and directly compare the performances of the two approaches.

© 2012 OSA

OCIS Codes
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(180.0180) Microscopy : Microscopy
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

History
Original Manuscript: December 9, 2011
Revised Manuscript: January 5, 2012
Manuscript Accepted: January 9, 2012
Published: February 13, 2012

Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Yannick Sonnefraud, Sarp Kerman, Giuliana Di Martino, Dang Yuan Lei, and Stefan A. Maier, "Directional excitation of surface plasmon polaritons via nanoslits under varied incidence observed using leakage radiation microscopy," Opt. Express 20, 4893-4902 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-5-4893


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