Journal
OPTICS EXPRESS
Volume 21, Issue 8, Pages 9397-9406Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.009397
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Funding
- Air Force Office of Scientific Research (AFOSR) [FA9550-09-1-0562]
- Army Research Office through a Multidisciplinary University Research Initiative [W911NF-09-1-0539]
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Axisymmetric radiating and scattering structures whose rotational invariance is broken by non-axisymmetric excitations present an important class of problems in electromagnetics. For such problems, a cylindrical wave decomposition formalism can be used to efficiently obtain numerical solutions to the full-wave frequency-domain problem. Often, the far-field, or Fraunhofer region is of particular interest in scattering cross-section and radiation pattern calculations; yet, it is usually impractical to compute full-wave solutions for this region. Here, we propose a generalization of the Stratton-Chu far-field integral adapted for 2.5D formalism. The integration over a closed, axially symmetric surface is analytically reduced to a line integral on a meridional plane. We benchmark this computational technique by comparing it with analytical Mie solutions for a plasmonic nanoparticle, and apply it to the design of a three-dimensional polarization-insensitive cloak. (C) 2013 Optical Society of America
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