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.
Autori interni: | |
Autori: | J. Berthelot; F. Tantussi; P. Rai; G. Colas des Francs; J.C. Weeber; A. Dereux; F. Fuso; M. Allegrini; A. Bouhelier |
Titolo: | Determinant role of the edges in defining surface plasmon propagation in stripe waveguides and tapered concentrators |
Anno del prodotto: | 2012 |
Digital Object Identifier (DOI): | 10.1364/JOSAB.29.000226 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.