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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 19 — Sep. 23, 2013
  • pp: 21714–21727

Homogenization of three-dimensional metamaterial objects and validation by a fast surface-integral equation solver

Xing-Xiang Liu, Jackson W. Massey, Ming-Feng Wu, Kristopher T. Kim, Robert A. Shore, Ali E. Yılmaz, and Andrea Alù  »View Author Affiliations


Optics Express, Vol. 21, Issue 19, pp. 21714-21727 (2013)
http://dx.doi.org/10.1364/OE.21.021714


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Abstract

A homogenization model is applied to describe the wave interaction with finite three-dimensional metamaterial objects composed of periodic arrays of magnetodielectric spheres and is validated with full-wave numerical simulations. The homogenization is based on a dipolar model of the inclusions, which is shown to hold even in the case of densely packed arrays once weak forms of spatial dispersion and the full dynamic array coupling are taken into account. The numerical simulations are based on a fast surface-integral equation solver that enables the analysis of scattering from complex piecewise homogeneous objects. We validate the homogenization model by considering electrically large disk- and cube-shaped arrays and quantify the accuracy of the transition from an array of spheres to a homogeneous object as a function of the array size. Simulation results show that the fields scattered from large arrays with up to one thousand spheres and equivalent homogeneous objects agree well, not only far away from the arrays but also near them.

© 2013 OSA

OCIS Codes
(050.1755) Diffraction and gratings : Computational electromagnetic methods
(260.2065) Physical optics : Effective medium theory
(160.3918) Materials : Metamaterials

ToC Category:
Metamaterials

History
Original Manuscript: May 31, 2013
Revised Manuscript: August 31, 2013
Manuscript Accepted: September 2, 2013
Published: September 6, 2013

Citation
Xing-Xiang Liu, Jackson W. Massey, Ming-Feng Wu, Kristopher T. Kim, Robert A. Shore, Ali E. Yılmaz, and Andrea Alù, "Homogenization of three-dimensional metamaterial objects and validation by a fast surface-integral equation solver," Opt. Express 21, 21714-21727 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-19-21714


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