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Article Dans Une Revue Journal of the Optical Society of America B Année : 2012

Determinant role of the edges in defining surface plasmon propagation in stripe waveguides and tapered concentrators

Résumé

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 imag29e 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.
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Dates et versions

hal-00703524 , version 1 (02-06-2012)

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J. Berthelot, F. Tantussi, P. Rai, Gérard Colas Des Francs, Jean Claude Weeber, et al.. Determinant role of the edges in defining surface plasmon propagation in stripe waveguides and tapered concentrators. Journal of the Optical Society of America B, 2012, 29 (2), pp.226. ⟨10.1364/JOSAB.29.000226⟩. ⟨hal-00703524⟩
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