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Determinant role of the edges in defining surface plasmon propagation in stripe waveguides and tapered concentrators |
JOSA B, Vol. 29, Issue 2, pp. 226-231 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000226
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Abstract
In this paper, we experimentally show the effect of waveguide discontinuity on the propagation of the surface plasmon in metal stripes and tapered terminations. Dual-plane leakage microscopy and near-field microscopy were performed on Au stripes with varied widths to image the surface plasmon intensity distribution in real and reciprocal spaces. We unambiguously demonstrate that edge diffraction is the limiting process determining the cutoff conditions of the surface plasmon mode. Finally, we determine the optimal tapered geometry leading to the highest transmission.
© 2012 Optical Society of America
OCIS Codes
(130.0130) Integrated optics : Integrated optics
(130.2790) Integrated optics : Guided waves
(240.0240) Optics at surfaces : Optics at surfaces
(240.6680) Optics at surfaces : Surface plasmons
ToC Category:
Optics at Surfaces
History
Original Manuscript: September 6, 2011
Manuscript Accepted: November 3, 2011
Published: January 23, 2012
Citation
Johann Berthelot, Francesco Tantussi, Padmnabh Rai, Gérard Colas des Francs, Jean-Claude Weeber, Alain Dereux, Francesco Fuso, Maria Allegrini, and Alexandre Bouhelier, "Determinant role of the edges in defining surface plasmon propagation in stripe waveguides and tapered concentrators," J. Opt. Soc. Am. B 29, 226-231 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-2-226
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