Far-field analysis of axially symmetric three-dimensional directional cloaks.
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.
Type
Journal articleSubject
Computer SimulationLight
Models, Theoretical
Refractometry
Scattering, Radiation
Surface Plasmon Resonance
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https://hdl.handle.net/10161/7577Collections
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David R. Smith
James B. Duke Distinguished Professor of Electrical and Computer Engineering
Dr. David R. Smith is currently the James B. Duke Professor of Electrical and Computer
Engineering Department at Duke University. He is also Director of the Center for Metamaterials
and Integrated Plasmonics at Duke and holds the positions of Adjunct Associate Professor
in the Physics Department at the University of California, San Diego, and Visiting
Professor of Physics at Imperial College, London. Dr. Smith received his Ph.D. in
1994 in Physics from the University of California, San D
Yaroslav A. Urzhumov
Adjunct Assistant Professor in the Department of Electrical and Computer Engineering
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<![endif]-->Dr. Urzhumov is Adjunct Assistant Professor of ECE at Duke University,
and also a Technologist at the Metamaterials Commercialization Center of Intellectual
Ventures. Previously a research faculty at Duke, he works on applied and theoretical
aspects of metama
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