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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 20 — Sep. 28, 2009
  • pp: 17234–17241

SERS-active substrate based on gap surface plasmon polaritons

Hyun Chul Kim and Xing Cheng  »View Author Affiliations

Optics Express, Vol. 17, Issue 20, pp. 17234-17241 (2009)

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We numerically investigate the optical field enhancement supported by gap surface plasmon polaritons (GSPPs). The optical field enhancement at the edge of the nanostructures originates not only from localized surface plasmon (LSP) resonance but also from multiple scattering and coupling of GSPPs in the spacer region between two metal plates. By calculating field enhancement, we predict surface-enhanced Raman scattering (SERS) enhancement factors (EFs) of up to 1011 for equilateral triangular nanostructures. The SERS EFs as a function of the geometry and dimension of the nanostructures are obtained by simulation. The effect of the surrounding medium on the SERS EFs is also investigated. Coupled with easy fabrication, those nanostructures are expected to find important applications in optical sensing as a SERS-active substrate.

© 2009 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

Original Manuscript: May 18, 2009
Revised Manuscript: July 16, 2009
Manuscript Accepted: July 17, 2009
Published: September 14, 2009

Hyun Chul Kim and Xing Cheng, "SERS-active substrate based on gap surface plasmon polaritons," Opt. Express 17, 17234-17241 (2009)

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