Discrete-dipole approximation for scattering by features on surfaces by means of a twodimensional fast Fourier transform technique

Journal article (1997)

Authors

R. Schmehl Karlsruhe Institut für Technologie, Arizona State University

Brent M. Nebeker Arizona State University

Edwin Dan Hirleman Arizona State University

Affiliation

External organisation

Irradiance Fast Fourier transform Light scattering Coupled-dipole method Differential scattering cross section Discrete-dipole approximation Particles on surfaces

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Published Date

01-01-1997

Language

English

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Abstract

A two-dimensional fast Fourier transform technique is proposed for accelerating the computation of scattering characteristics of features on surfaces by using the discrete-dipole approximation. The two-dimensional fast Fourier transform reduces the CPU execution time dependence on the number of dipoles N from O(N2) to O(N log N). The capabilities and flexibility of a discrete-dipole code implementing the technique are demonstrated with scattering results from circuit features on surfaces.