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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 8 — Apr. 22, 2013
  • pp: 9397–9406

Far-field analysis of axially symmetric three-dimensional directional cloaks

Cristian Ciracì, Yaroslav Urzhumov, and David R. Smith  »View Author Affiliations

Optics Express, Vol. 21, Issue 8, pp. 9397-9406 (2013)

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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.

© 2013 OSA

OCIS Codes
(000.3860) General : Mathematical methods in physics
(290.5850) Scattering : Scattering, particles
(230.3205) Optical devices : Invisibility cloaks

ToC Category:

Original Manuscript: February 25, 2013
Revised Manuscript: April 2, 2013
Manuscript Accepted: April 2, 2013
Published: April 9, 2013

Cristian Ciracì, Yaroslav Urzhumov, and David R. Smith, "Far-field analysis of axially symmetric three-dimensional directional cloaks," Opt. Express 21, 9397-9406 (2013)

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