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Electromagnetic multipole theory for optical nanomaterials
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© 2012 IOP Publishing. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. (http://creativecommons.org/licenses/by/3.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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en
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093033
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New Journal of Physics, Volume 14, Issue 9
Abstract
Optical properties of natural or designed materials are determined by the electromagnetic multipole moments that light can excite in the constituent particles. In this paper, we present an approach to calculating the multipole excitations in arbitrary arrays of nanoscatterers in a dielectric host medium. We introduce a simple and illustrative multipole decomposition of the electric currents excited in the scatterers and connect this decomposition to the classical multipole expansion of the scattered field. In particular, we find that completely different multipoles can produce identical scattered fields. The presented multipole theory can be used as a basis for the design and characterization of optical nanomaterials.
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Grahn, Patrick & Shevchenko, Andriy & Kaivola, Matti. 2012. Electromagnetic multipole theory for optical nanomaterials. New Journal of Physics. Volume 14, Issue 9. ISSN 1367-2630 (electronic). DOI: 10.1088/1367-2630/14/9/093033.