Capturing plasmonic behaviors in light scattering by spheres using finite element methods and asymptotic quadrature
Résumé
We present a Finite Element Method (FEM) based approach to capture plasmonic behaviors in light scattering by metallic spheres. Surface plasmons are highly oscillatory waves localized to the interface between a dielectric (air, vacuum) and a metal (gold, silver). As surface plasmons lead to large field enhancements, they are useful for high-resolution imaging and other applications. It is challenging to capture them numerically, and standard methods do not succeed. In the context of spherical scatterers, we identify where plasmonic excitations can arise, and propose an approach to extract the fastscale plasmonic behavior from the formulation, allowing FEM to approach the slow (smooth) part of the solution.
Domaines
Mathématiques [math]
Origine : Fichiers produits par l'(les) auteur(s)