Correcting the Fabry-Perot artifacts in metamaterial retrieval procedures

Xing-Xiang Liu, David A. Powell, and Andrea Alù
Phys. Rev. B 84, 235106 – Published 1 December 2011

Abstract

We discuss the well-known limitations in the retrieval of homogenized constitutive parameters based on reflection and transmission from metamaterial slabs arising near the Fabry-Perot resonances of the samples under analysis. The associated artifacts can significantly affect the retrieval results, causing Lorentzian-like nonphysical features. We discuss the nature of these artifacts and propose a general method to correct them based on a numerical regression procedure. These concepts are applied to a homogeneous slab and a periodic metamaterial array, showing that the proposed correction can provide an improved retrieval technique for metamaterial homogenization purposes.

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  • Received 13 June 2011

DOI:https://doi.org/10.1103/PhysRevB.84.235106

©2011 American Physical Society

Authors & Affiliations

Xing-Xiang Liu1, David A. Powell2, and Andrea Alù1,*

  • 1Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
  • 2Nonlinear Physics Center, Research School of Physics and Engineering, The Australian National University, Canberra ACT 0200, Australia

  • *alu@mail.utexas.edu

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Issue

Vol. 84, Iss. 23 — 15 December 2011

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