Absorption and Scattering of Electromagnetic Radiation by Prismatic Columns:Anomalous Diffraction Approximation

摘要

Using the anomalous diffraction approximation, we obtain absorption andextinction cross sections of several differently shaped prismatic columns and plates in a simple analytical form. Specifically, we consider columns with triangular, trapezoidal, parallelogram, and hexagonal bases. We estimate the anomalous diffraction approximation results to be within 25% accuracy for refractive indices with real parts up to 1.40 and within 10% accuracy for real parts up to 1.20.