MODELING OF PLASMONIC PHENOMENA IN NANOSTRUCTURED SURFACES

Plasmonic phenomena in nanostructured surfaces are modeled by considering isotropic point-like nanoparticles whose responses to an incident surface plasmon polariton (SPP) field are phenomenologically related to their effective polarizabilities. Numerical simulations of different SPP elastic (in-plane) scattering orders and the operation of simple plasmonic devices are pre-sented. Futhermore, nonlinear microscopy with a tightly focused laser beam scanning over a sample surface was modeled by using of analytic representations of the Green dyadic in the near- and far-field regions, with the latter being approximated by the part describing the scat-tering via excitation of SPPs. In general, the stability with respect to geometrical parameters and dispersion were the main features investigated in the presented plasmonic phenomena