Light localization induced by a random imaginary refractive index

A. Basiri, Y. Bromberg, A. Yamilov, H. Cao, and T. Kottos

Phys. Rev. A 90, 043815 – Published 13 October 2014

Abstract

We show the emergence of light localization in arrays of coupled optical waveguides with randomness only in the imaginary part of their refractive index and develop a one-parameter scaling theory for the normalized participation number of Floquet-Bloch modes. This localization introduces a different length scale in the decay of the autocorrelation function of a paraxial beam propagation. Our results are relevant to a vast family of systems with randomness in the dissipative part of their impedance spatial profile.

Received 23 February 2014
Revised 14 May 2014

DOI:https://doi.org/10.1103/PhysRevA.90.043815

Authors & Affiliations

A. Basiri¹, Y. Bromberg², A. Yamilov³, H. Cao², and T. Kottos¹

¹Department of Physics, Wesleyan University, Middletown, Connecticut 06459, USA
²Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA
³Department of Physics, Missouri University of Science and Technology, Rolla, Missouri 65409, USA

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Vol. 90, Iss. 4 — October 2014

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