On the Importance of Local-Field Corrections for Polarizable Particles on a Finite Lattice: Application to the Discrete Dipole Approximation

Published

June 1, 2004

Author(s)

A Rahmani, P C. Chaumet, Garnett W. Bryant

Abstract

We investigate the influence of local-field effects on the electromagnetic response of a collection of dipoles. We derive the local-field corrected static polarizability for a collection of dipoles in the case of a scatterer with uniform depolarization. We then use this correction within the discrete dipole approximation to study scattering of an electromagnetic wave by a spherical particle. The local-field correction leads to a new formulation of the discrete dipole approximation. We also discuss the feasibility of a generalization of the local-field correction to arbitrary scatterers.

Citation

Astrophysical Journal

Volume

607

Issue

No 2

Pub Type

Journals

Keywords

discrete dipole approximation, electromagnetic theory, light scattering, local-field effects, mie theory

Citation

Rahmani, A. , Chaumet, P. and Bryant, G. (2004), On the Importance of Local-Field Corrections for Polarizable Particles on a Finite Lattice: Application to the Discrete Dipole Approximation, Astrophysical Journal (Accessed October 10, 2025)