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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 8 — Apr. 22, 2013
  • pp: 9734–9756

Scattering of a surface plasmon polariton by a localized dielectric surface defect

Rodrigo E. Arias and Alexei A. Maradudin  »View Author Affiliations

Optics Express, Vol. 21, Issue 8, pp. 9734-9756 (2013)

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On the basis of a rigorous, nonperturbative, purely numerical solution of the corresponding reduced Rayleigh equation for the scattering amplitudes we have studied the scattering of a surface plasmon polariton by a two dimensional dielectric defect on a planar metal surface. The profile of the defect is assumed to be an arbitrary single-valued function of the coordinates in the plane of the metal surface, and to be differentiable with respect to those coordinates. When the defect is circularly symmetric and the dependence of the scattering amplitudes on the azimuthal angle is expressed by a rotational expansion, the reduced Rayleigh equation is transformed into a pair of one-dimensional integral equations for each value of the rotational quantum number. This approach is applied to a defect in the form of an isotropic Gaussian function. The differential cross sections for the scattering of the incident surface plasmon polariton into volume electromagnetic waves in the vacuum above the surface and into other surface plasmon polaritons are calculated, as well as the intensity of the field near the surface. These results differ significantly from the corresponding results for a metallic defect on a metallic substrate.

© 2013 OSA

OCIS Codes
(240.5420) Optics at surfaces : Polaritons
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics
(290.5825) Scattering : Scattering theory

ToC Category:
Optics at Surfaces

Original Manuscript: February 11, 2013
Revised Manuscript: March 26, 2013
Manuscript Accepted: April 2, 2013
Published: April 12, 2013

Rodrigo E. Arias and Alexei A. Maradudin, "Scattering of a surface plasmon polariton by a localized dielectric surface defect," Opt. Express 21, 9734-9756 (2013)

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