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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 10 — May. 11, 2009
  • pp: 8669–8675

SERS enhancements via periodic arrays of gold nanoparticles on silver film structures

Jason M. Montgomery, Alexandra Imre, Ulrich Welp, Vitalii Vlasko-Vlasov, and Stephen K. Gray  »View Author Affiliations

Optics Express, Vol. 17, Issue 10, pp. 8669-8675 (2009)

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We discuss surface enhanced Raman spectroscopy (SERS) structures aimed at providing robust and reproducible enhancements. The structures involve periodic arrays of gold nanospheres near silver film structures that may also be patterned. They enable one to excite Bloch wave surface plasmon polaritons (SPPs) that can also couple to local surface plasmons (LSPs) of the nanospheres, leading to the possibility of multiplicative enhancements. If the magnitude of the average electric field, ∣E∣, between the particles is enhanced by g such that ∣E∣ = gE0∣, ∣E0∣ being the incident field, realistic finite-difference time-domain simulations show that under favorable circumstances g ≈ 0.6 gSPPgLSP, where gSPP and gLSP are enhancement factors associated with the individual components. SERS enhancements for the structures can be as high as O(g4) = 108.

© 2009 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(240.6680) Optics at surfaces : Surface plasmons
(050.1755) Diffraction and gratings : Computational electromagnetic methods
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

Original Manuscript: February 25, 2009
Revised Manuscript: April 3, 2009
Manuscript Accepted: April 10, 2009
Published: May 8, 2009

Jason M. Montgomery, Alexandra Imre, Ulrich Welp, Vitalii Vlasko-Vlasov, and Stephen K. Gray, "SERS enhancements via periodic arrays of gold nanoparticles on silver film structures," Opt. Express 17, 8669-8675 (2009)

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