Localization of Light In 2D Random Media
The localization of the electron wave functions is a well-known concept in contemporary condensed matter physics. It originates from investigations of the electron transport in disordered solids, usually semiconductors . In such media the propagation of electrons is altered by the presence of a random potential. As this phenomenon is completely based on the interference effects in multiple elastic scattering and since interference is a common property of all wave phenomena, many generalizations of the Anderson localization to other matter-waves (neutrons) as well as classical waves (electromagnetic and acoustic waves) have been proposed [2, 3, 4, 5, 6]. In this paper we focus our attention on electromagnetic waves. There is a variety of experimental investigations in this case, both in the optical and microwave domains. Weak localization, manifesting itself as enhanced coherent backscattering, is now experimentally established beyond any doubts [7, 8, 9, 10]. Weak localization is relatively well understood theoretically [11,12,13] and, as the coherent backscattering affects the diffusion constant describing the propagation of electromagnetic waves in strongly scattering random media, it is the precursor of strong localization.
KeywordsRandom Medium Free Field Weak Localization Anderson Localization Classical Wave
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