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SCATTERING CROSS-SECTIONS AND INCOHERENT SPECIFIC INTENSITIES FOR PARTICLES OF IRREGULAR SHAPE AND FINITE CONDUCTIVITY - FULL WAVE APPROACH
Abstract
Optical and infrared electromagnetic scattering by layers of randomly distributed particles of irregular shape and finite conductivity is investigated through the use of the equation of transfer. The irregular shaped particles are characterized by their random rough surface height spectral density functions or their Fourier transform of the surface height autocorrelation function. In these theoretical investigations the solutions for the Copolarized and Cross-polarized scattered electromagnetic waves from the individual irregular shaped particles are based on the full wave approach. The full wave approach accounts for diffuse scattering and specular point scattering in a unified self consisted manner. The extinction cross section of the irregular shaped particles with rough surfaces are obtained by taking into account the deformation of the shadow boundary in the application of the forward scattered theorem. The scattering cross sections and extinction cross sections of the particles are used in the equation of transfer in order to compute the reflected and the transmitted incoherent specific intensities for linearly polarized and circularly polarized excitations. Both the single scatter and the multiple scatter incoherent specific intensities are evaluated for particles with smooth and rough surfaces. The full wave analysis is also used to derive a simple analytical expressions for optical scattering by different rough surface primitives such as spheres, cones, cylinders and planes. This phase of our investigations is applied to computer aided geometric design of three dimensional metallic objects. This simple analytic form which is based on a rigorous physical/mathematical model is readily used to both locate contours of isointensity and to determine their appropriate relative intensities.
Subject Area
Electrical engineering
Recommended Citation
CHAKRABARTI, SWAPAN, "SCATTERING CROSS-SECTIONS AND INCOHERENT SPECIFIC INTENSITIES FOR PARTICLES OF IRREGULAR SHAPE AND FINITE CONDUCTIVITY - FULL WAVE APPROACH" (1986). ETD collection for University of Nebraska-Lincoln. AAI8624582.
https://digitalcommons.unl.edu/dissertations/AAI8624582