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It is shown that large percolation-enhanced nonlinear scattering occurs in metal-dielectric random composites near the percolation threshold. The enhancement is due to giant local electric field fluctuations that are extremely inhomogeneous and consist of spatially separated sharp peaks, "hot" spots, where the local field is greater by many orders of magnitude than the applied field.
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Sarychev et al. (1999) studied this question.
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