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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 7 — Mar. 31, 2008
  • pp: 4945–4951

Dispersion relation of surface plasmon wave propagating along a curved metal-dielectric interface

Jiunn-Woei Liaw and Po-Tsang Wu  »View Author Affiliations

Optics Express, Vol. 16, Issue 7, pp. 4945-4951 (2008)

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The dispersion relations of surface plasmon wave (SPW) propagating along a convex or concave metal-dielectric interface with a radius of curvature are studied by solving the root of a characteristic equation in terms of Bessel and Hankel functions of complex order numerically. For the convex geometry, a metallic circular cylinder embedded in a dielectric host is modeled, whereas for the concave one, a dielectric cylinder in a metallic host is modeled. We found that the phase velocity of SPW along a convex interface is always less than that of SPW along a planar one. On the contrary, the phase velocity of a concave case is faster than that of a planar one. For both cases, the attenuation constants are larger than a planar one, due to the radial radiation of the energy into the surrounding medium, except the dissipation in the metal.

© 2008 Optical Society of America

OCIS Codes
(230.7390) Optical devices : Waveguides, planar
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves
(260.3910) Physical optics : Metal optics

ToC Category:
Optics at Surfaces

Original Manuscript: January 7, 2008
Revised Manuscript: March 19, 2008
Manuscript Accepted: March 22, 2008
Published: March 26, 2008

Jiunn-Woei Liaw and Po-Tsang Wu, "Dispersion relation of surface plasmon wave propagating along a curved metal-dielectric interface," Opt. Express 16, 4945-4951 (2008)

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