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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 19 — Sep. 17, 2007
  • pp: 12331–12337

Surface plasmon mode analysis of nanoscale metallic rectangular waveguide

Fanmin Kong, Bae-Ian Wu, Hongsheng Chen, and Jin Au Kong  »View Author Affiliations

Optics Express, Vol. 15, Issue 19, pp. 12331-12337 (2007)

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A detailed study of guided modes in a nanoscale metallic rectangular waveguide is presented by using the effective dielectric constant approach. The guided modes, including both traditional waveguide mode and surface plasmon mode, are investigated for the silver rectangular waveguide. The mode evolution in narrow waveguide is also discussed with the emphasis on the dependence of mode dispersion with waveguide height. Finally, the red-shift of the cutoff wavelength of the fundamental mode is observed when the waveguide height decreases, contrary to the behavior of regular metallic waveguide with PEC boundary. The comprehensive analysis can provide some guideline in the design of subwavelength optical devices based on the dispersion characteristics of metallic rectangular bore.

© 2007 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(240.6680) Optics at surfaces : Surface plasmons
(260.2030) Physical optics : Dispersion

ToC Category:
Optics at Surfaces

Original Manuscript: August 29, 2007
Revised Manuscript: September 7, 2007
Manuscript Accepted: September 8, 2007
Published: September 13, 2007

Fanmin Kong, Bae-Ian Wu, Hongsheng Chen, and Jin Au Kong, "Surface plasmon mode analysis of nanoscale metallic rectangular waveguide," Opt. Express 15, 12331-12337 (2007)

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