University of Hertfordshire

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From the same journal

By the same authors

Modelling light scattering by absorbing smooth and slightly rough facetted particles

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Original languageEnglish
Pages (from-to)71-80
Number of pages10
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume157
Early online date13 Feb 2015
DOIs
Publication statusPublished - May 2015

Abstract

A method for approximating light scattering properties of strongly absorbing facetted particles which are large compared to the wavelength is presented. It consists in adding the approximated external diffraction and reflection far fields and is demonstrated for a smooth hexagonal prism. This computationally fast method is extended towards prisms with slightly rough surfaces by introducing a surface scaling factor in order to account for edge effects on subfacets forming the rough surface. These effects become more pronounced with decreasing subfacet dimension to wavelength ratio. Azimuthally resolved light scattering patterns, phase functions and degree of linear polarisation obtained by this method and by the Discrete Dipole Approximation are compared for hexagonal prisms with smooth and slightly rough surfaces, respectively.

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