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

Publication Type | Journal Article |

Year of Publication | 2013 |

Authors | C. Ciracì, Y. Urzhumov, D.R. Smith |

Journal | Optics Express |

Volume | 21 |

Issue | 8 |

Pagination | 9397 |

Date Published | 2013 |

Abstract | 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. |

DOI | 10.1364/OE.21.009397 |

Short Title | Opt. Express |