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Exact dipolar moments of a localized electric current distribution

Fernandez-Corbaton, I.; Nanz, S.; Alaee, R.; Rockstuhl, C.

Abstract:
The multipolar decomposition of current distributions is used in many branches of physics. Here, we obtain new exact expressions for the dipolar moments of a localized electric current distribution. The typical integrals for the dipole moments of electromagnetically small sources are recovered as the lowest order terms of the new expressions in a series expansion with respect to the size of the source. All the higher order terms can be easily obtained. We also provide exact and approximated expressions for dipoles that radiate a definite polarization handedness (helicity). Formally, the new exact expressions are only marginally more complex than their lowest order approximations.

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Volltext §
DOI: 10.5445/IR/1000051373
Originalveröffentlichung
DOI: 10.1364/OE.23.033044
Scopus
Zitationen: 16
Web of Science
Zitationen: 16
Coverbild
Zugehörige Institution(en) am KIT Institut für Theoretische Festkörperphysik (TFP)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 1094-4087
urn:nbn:de:swb:90-513735
KITopen-ID: 1000051373
HGF-Programm 43.23.01 (POF III, LK 01)
Erschienen in Optics Express
Band 23
Heft 26
Seiten 33044-33064
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Scopus
Web of Science
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