Integral-Equation Study of Ray Effects and Natural-Mode Resonances in a 2-D Dielectric Prism
Abstract
We analyze the interplay of two different types of
electromagnetic behavior demonstrated by a 2-D dielectric
prism: Geometrical Optics and resonance. As it is shown, the
first is responsible, for instance, for enhanced reflection from an
isosceles 90-degree prism of arbitrary epsilon and size, if
illuminated from the base. The second is responsible for the
peaks in the total scattering and absorption cross-sections (RCS)
at the natural-mode frequencies. The numerical model is based
on Nystrom discretization of Muller-type integral equations that
provides guarantied convergence.
