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Critical properties of the optical field localization in a three-dimensional percolating system: Theory and experiment

G. Burlak,A. D'iaz-de-Anda,B. Malomed,E. Martinez-S'anchez,G. Medina-Ángel,R. Morales-Nava,J. J. Mart'inez-Ocampo,M. E. de-Anda-Reyes,A. Romero-L'opez

Published 2023 in Chaos, Solitons & Fractals

ABSTRACT

We systematically study the optical field localization in an active three-dimensional (3D) disordered percolating system with light nanoemitters incorporated in percolating clusters. An essential feature of such a hybrid medium is that the clusters are combined into a fractal radiation pattern, in which light is simultaneously emitted and scattered by the disordered structures. Theoretical considerations, based on systematic 3D simulations, reveal nontrivial dynamics in the form of propagation of localized field bunches in the percolating material. We obtain the length of the field localization and dynamical properties of such states as functions of the occupation probability of the disordered clusters. A transition between the dynamical states and narrow point-like fields pinned to the emitters is found. The theoretical analysis of the fractal field properties is followed by an experimental study of the light generation by nanoemitters incorporated in the percolating clusters. The experimental results corroborate theoretical predictions.

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