Excitation of broadband surface plasmon polaritons: Plasmonic continuum spectroscopy

A. Bouhelier and G. P. Wiederrecht
Phys. Rev. B 71, 195406 – Published 11 May 2005

Abstract

The excitation of surface plasmon polaritons in a thin metal film is extremely sensitive to the surrounding dielectric environment. We introduce here a far-field method to directly observe surface plasmon propagation and demonstrate that the lateral intensity decay length is affected by a change of the interface properties. The method relies on the detection of the intrinsic lossy modes associated with plasmon propagation in thin films. We also introduce a method to excite a broad spectral distribution of surface plasmons simultaneously throughout the visible spectrum allowing a unique form of surface plasmon-based spectroscopy.

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  • Received 21 December 2004

DOI:https://doi.org/10.1103/PhysRevB.71.195406

©2005 American Physical Society

Authors & Affiliations

A. Bouhelier and G. P. Wiederrecht

  • Chemistry Division and Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA

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Issue

Vol. 71, Iss. 19 — 15 May 2005

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