Relationship between the scattering of homogeneous and evanescent electromagnetic waves by metallic nanoparticles

摘要

Scattering of light gives information about the nature of the wave and its interaction with matter. Homogeneous and evanescent waves are elastically scattered by metallic nanoparticles (NPs) in a different manner. In the present article, we will establish a method that shows the differences between homogeneous and evanescent waves by the analysis of the intensity scattered by NPs. Such a comparison is facilitated in the frame of spatial frequencies and leads to unambiguous characterization of the homogeneous or evanescent nature of the waves that are scattered.