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Phys. Rev. Lett. 99, 193902 (2007) [4 pages]

Suppression of Anderson Localization in Disordered Metamaterials

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Ara A. Asatryan1, Lindsay C. Botten1, Michael A. Byrne1, Valentin D. Freilikher2, Sergey A. Gredeskul3,4, Ilya V. Shadrivov4, Ross C. McPhedran5, and Yuri S. Kivshar4
1Department of Mathematical Sciences and Center for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), University of Technology, Sydney, NSW 2007, Australia
2Department of Physics, Bar-Ilan University, Raman-Gan, 52900, Israel
3Department of Physics, Ben Gurion University of the Negev, Beer Sheva, 84105, Israel
4Nonlinear Physics Center and Center for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), Australian National University, Canberra, ACT 0200, Australia
5School of Physics and Center for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), University of Sydney, Sydney, NSW 2006, Australia

Received 23 May 2007; revised 4 October 2007; published 9 November 2007

We study wave propagation in mixed, 1D disordered stacks of alternating right- and left-handed layers and reveal that the introduction of metamaterials substantially suppresses Anderson localization. At long wavelengths, the localization length in mixed stacks is orders of magnitude larger than for normal structures, proportional to the sixth power of the wavelength, in contrast to the usual quadratic wavelength dependence of normal systems. Suppression of localization is also exemplified in long-wavelength resonances which largely disappear when left-handed materials are introduced.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.193902
DOI:
10.1103/PhysRevLett.99.193902
PACS:
42.25.Dd, 42.25.Fx, 72.15.Rn
 
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