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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 24 — Nov. 28, 2005
  • pp: 9766–9773

High sensitivity of surface plasmon of weakly-distorted metallic surfaces

Wei-Chih Liu  »View Author Affiliations

Optics Express, Vol. 13, Issue 24, pp. 9766-9773 (2005)

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Effects of nano-scale surface geometry on surface plasmon are studied by the coordinate-transformation differential method to numerically calculate surface plasmon modes on a weakly disordered metallic surface. An air-silver surface profile with a subwavelength period and a nano-scale height at wavelength of 650 nm are chosen and it is found that the Bloch wave numbers and the surface plasmon modes are highly sensitive with distortions of only a few nanometers for periods much less than wavelength. On the contrary, distortions of long periods which are comparable to wavelength have little impact. Three typical surface profiles exhibit surface plasmon modes of wide variations.

© 2005 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(240.0240) Optics at surfaces : Optics at surfaces
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics

ToC Category:
Research Papers

Original Manuscript: October 20, 2005
Revised Manuscript: October 19, 2005
Published: November 28, 2005

Wei-Chih Liu, "High sensitivity of surface plasmon of weakly-distorted metallic surfaces," Opt. Express 13, 9766-9773 (2005)

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