Dielectric-loaded surface plasmon polariton waveguides: Figures of merit and mode characterization by image and Fourier plane leakage microscopy

J. Grandidier, S. Massenot, G. Colas des Francs, A. Bouhelier, J.-C. Weeber, L. Markey, A. Dereux, J. Renger, M. U. González, and R. Quidant
Phys. Rev. B 78, 245419 – Published 19 December 2008

Abstract

Waveguiding of surface plasmon polaritons by dielectric-loaded metal structures is studied in detail by combining numerical simulations and leakage radiation microscopy. These types of waveguides are first numerically investigated using the effective index model and the differential method. We analyzed systematically the influence of the ridge width and thickness of the waveguide on the properties of the surface plasmon guided modes. In particular we investigated the confinement factor of the modes and their associated propagation lengths. These two parameters can be optimized by adjusting the thickness of the dielectric layer. Waveguides loaded with thick and thin dielectric ridges are then optically characterized by leakage radiation microscopy. The mode propagation distance is measured by direct-space imaging and the propagation constants are evaluated by Fourier imaging and analysis. Good agreements are found between theoretical and experimental data.

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  • Received 24 June 2008

DOI:https://doi.org/10.1103/PhysRevB.78.245419

©2008 American Physical Society

Authors & Affiliations

J. Grandidier*, S. Massenot, G. Colas des Francs, A. Bouhelier, J.-C. Weeber, L. Markey, and A. Dereux

  • Institut Carnot de Bourgogne, UMR 5209, CNRS, Université de Bourgogne, 9 Avenue A. Savary, BP 47 870, 21078 Dijon, France

J. Renger, M. U. González, and R. Quidant

  • Institut de Ciencies Fotoniques (ICFO), Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain

  • *jonathan.grandidier@u-bourgogne.fr
  • Also at ICREA-Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain.

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Issue

Vol. 78, Iss. 24 — 15 December 2008

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