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

Published

Journal Article

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.

Full Text

Duke Authors

Cited Authors

  • Ciracì, C; Urzhumov, Y; Smith, DR

Published Date

  • April 2013

Published In

Volume / Issue

  • 21 / 8

Start / End Page

  • 9397 - 9406

PubMed ID

  • 23609650

Pubmed Central ID

  • 23609650

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

International Standard Serial Number (ISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/oe.21.009397

Language

  • eng