Work

Exact dipolar moments of a localized electric current distribution

Year: 2015

Type: article

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.

Source: Optics Express

DOI: 10.1364/oe.23.033044

Authors: Ivan Fernandez-Corbaton, Stefan Nanz, Rasoul Alaee, Carsten Rockstuhl

Institution: Karlsruhe Institute of Technology

Language: English

Topic: Quantum and Classical Electrodynamics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,064

Funder: Deutsche Forschungsgemeinschaft