META Conference, META'12

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Confinement effect of the Localized Surface Plasmons on the coupling of gold nanolithographied structures: Application to Surface Enhanced Raman Scattering
Nicolas Guillot, Cristiano D'Andrea, Andrea Toma, Pablo Albella, Remo Proietti, Barbara Fazio, Onofrio Marago, Enzo Di Fabrizio, Javier Aizpurua, Pietro Gucciardi, Marc Lamy de la Chapelle

Last modified: 2011-12-14


The aim of this work is to show the effect of the confinement of the Localized Surface Plasmons (LSP), located on the surface of arrays of gold nanorods in dimers configuration, on the coupling efficiency and its direct incidence on the Surface Enhanced Raman Scattering (SERS) intensity. We show that the nanoparticles size and the excitation wavelengths are key factors involved in the modification of the confinement of the LSPs. In fact, an increase of the nanoparticles aspect ratio and a decrease of the excitation wavelength result in a decrease of the LSPs confinement.