On the importance of local-field corrections for polarizable particles on a finite lattice: Application to the discrete dipole approximation

Rahmani, A; Chaumet, PC; Bryant, GW

On the importance of local-field corrections for polarizable particles on a finite lattice: Application to the discrete dipole approximation

Rahmani, A

Chaumet, PC Bryant, GW

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Publication Type:: Journal Article
Citation:: Astrophysical Journal, 2004, 607 (2 I), pp. 873 - 878
Issue Date:: 2004-06-01

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Field	Value	Language
dc.contributor.author	Rahmani, A https://orcid.org/0000-0001-7272-9106	en_US
dc.contributor.author	Chaumet, PC	en_US
dc.contributor.author	Bryant, GW	en_US
dc.date.issued	2004-06-01	en_US
dc.identifier.citation	Astrophysical Journal, 2004, 607 (2 I), pp. 873 - 878	en_US
dc.identifier.issn	0004-637X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/6083
dc.description.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 the scattering of an electromagnetic wave by a spherical particle. The local-field correction leads to a new formulation of the discrete dipole approximation that is exact in the long-wavelength limit and more accurate at finite frequencies. We also discuss the feasibility of a generalization of the local-field correction to arbitrary scatterers.	en_US
dc.relation.ispartof	Astrophysical Journal	en_US
dc.relation.isbasedon	10.1086/383609	en_US
dc.subject.classification	Astronomy & Astrophysics	en_US
dc.title	On the importance of local-field corrections for polarizable particles on a finite lattice: Application to the discrete dipole approximation	en_US
dc.type	Journal Article
utslib.citation.volume	2 I	en_US
utslib.citation.volume	607	en_US
utslib.for	0105 Mathematical Physics	en_US
utslib.for	0201 Astronomical and Space Sciences	en_US
utslib.for	0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.issue	2 I	en_US
pubs.publication-status	Published	en_US
pubs.volume	607	en_US

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 the scattering of an electromagnetic wave by a spherical particle. The local-field correction leads to a new formulation of the discrete dipole approximation that is exact in the long-wavelength limit and more accurate at finite frequencies. We also discuss the feasibility of a generalization of the local-field correction to arbitrary scatterers.

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http://hdl.handle.net/10453/6083