This work presents results of ab-initio simulations of continuous wave transport in disordered absorbing waveguides. Wave interference effects cause deviations from diffusive picture of wave transport and make the diffusion coefficient position- and absorption-dependent. As a consequence, the true limit of a zero diffusion coefficient is never reached in an absorbing random medium of infinite size, instead, the diffusion coefficient saturates at some finite constant value. Transition to this absorption-limited diffusion exhibits a universality which can be captured within the framework of the self-consistent theory (SCT) of localization. The results of this work (i) justify use of SCT in analyses of experiments in localized regime, provided that absorption is not weak; (ii) open the possibility of diffusive description of wave transport in the saturation regime even when localization effects are strong.



Keywords and Phrases

Waveguides; Absorption-limited; Constant Values; Continuous Wave; Disordered Waveguides; Interference Effects; Localization Effect; Saturation Regime; Wave Transport

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Article - Journal

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Final Version

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© 2013 Optical Society of American (OSA), All rights reserved.

Publication Date

01 May 2013

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Physics Commons