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Journal Articles Optics Express Year : 2011

Excitation of a one-dimensional evanescent wave by conical edge diffraction of surface plasmon

Abstract

The experimental observation of a one-dimensional evanescent wave supported by a 90◦ metal edge is reported. Through a measurement of in-plane momenta, we clearly demonstrate the dimensional character of this surface wave and show that it is non-radiative in the superstrate. Excitation conditions, lateral extension and polarization properties of this wave are discussed. Finally, we explore the effect of the surrounding dielectric medium and demonstrate that a single edge can sustain distinct excitations.

Dates and versions

hal-00703538 , version 1 (02-06-2012)

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Johann Berthelot, Alexandre Bouhelier, Gérard Colas Des Francs, Jean Claude Weeber, Alain Dereux. Excitation of a one-dimensional evanescent wave by conical edge diffraction of surface plasmon. Optics Express, 2011, 19 (6), pp.5303. ⟨10.1364/OE.19.005303⟩. ⟨hal-00703538⟩
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