Light scattering by supported metallic nanostructures: Polarization and spectroscopy in the near-field zone

We show in this paper, the analysis of polarization around nanoscopic objec ts in the near-field optics. The objects are illuminated through a transpar ent glass substrate under the condition of total internal reflection. The u se of metallic materials (Al, Au) is discussed in the optical images. Using numerical simulations based on the Green's dyadic technique, we compute th e total transmitted intensity of the scattered light and the different cart esian components associated to the electric field in the Attenuated Total R eflection configuration at constant height. The role of localized plasmon r esonance is brought to the fore in the optical images for nanoscopic metall ic objects (Au). This paper shows that it is possible to reduce the interfe rences due to the backward scattering on nanoscopic objects thanks to this analysis of polarization.