a Departamento de Física Aplicada, Universidad de Cantabria, Avda los Castros s/n, Santander 39005, Spain
b Army Research Laboratory, AMSRL-CI-EM, 2800 Powder Mill Road, Adelphi, 20783 MD, USA
Abstract:
Four theoretical and computational methods to describe the scattering from simple particles on substrates are presented and discussed. These methods are based on the extinction theorem, image theory, the double-interaction model, and geometrical optics (ray-tracing). We compare the four methods with measurements of scattered light from gold metallic cylinders resting on a gold metallic substrate. In particular, we analyze the co-polarized (s and p polarization) full-scan and back-scattering intensities in the far field within the plane of incidence. Advantages and disadvantages of each method as a computational and reliable tool are discussed.