Journal Article10.1021/NN901826Q
Double-Resonance Plasmon Substrates for Surface-Enhanced Raman Scattering with Enhancement at Excitation and Stokes Frequencies
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TL;DR: A surface-enhanced Raman scattering (SERS) substrate with plasmon resonances at both excitation and Stokes frequencies is reported, which combines localized surface plasmons on the nanoparticles with surface plAsmon polaritons excited on a gold film.
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Abstract: We report a surface-enhanced Raman scattering (SERS) substrate with plasmon resonances at both excitation and Stokes frequencies. This multilayer structure combines localized surface plasmons on the nanoparticles with surface plasmon polaritons excited on a gold film. The largest SERS enhancement factor for a gold device is measured to be 7.2 x 10(7), which is more than 2 orders of magnitude larger than that measured on a gold nanoparticle array on a glass substrate. The largest SERS enhancement for a silver device is measured to be 8.4 x 10(8).
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Stefan A. Maier
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TL;DR: In this article, the authors present an in-depth study of surface enhanced Raman scattering (SERS) enhancement factors and cross-sections, including several issues often overlooked, and demonstrate that SERS EFs as low as 107, as opposed to the figure of 1014 often claimed in the literature, are sufficient for SERS applications.
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The Optical Properties of Metal Nanoparticles: The Influence of Size, Shape, and Dielectric Environment
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Optical properties of gold nanorings
Javier Aizpurua,Per Hanarp,Duncan S. Sutherland,Mikael Käll,Garnett W. Bryant,F. J. García de Abajo +5 more
TL;DR: The optical response of ring-shaped gold nanoparticles prepared by colloidal lithography is investigated and the electric field associated with these plasmons exhibits uniform enhancement and polarization in the ring cavity, suggesting applications in near-infrared surface-enhanced spectroscopy and sensing.