We show that characteristics of localized waves in nonabsorbing media, such as narrow resonances, giant transmission fluctuations, strong spatial correlation, and extreme sensitivity to variations in the dielectric function of the medium, may make possible a new class of compact filters, transducers, and switches. Precursors of these effects are observed in microwave propagation through random mixtures of metallic and dielectric spheres.
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Genack et al. (1993) studied this question.
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