Correlation Length Facilitates Voigt Wave Propagation

Abstract

Under certain circumstances, Voigt waves can propagate in a biaxial composite medium even though the component material phases individually do not support Voigt wave propagation. This phenomenon is considered within the context of the strong– permittivity–fluctuation theory. A generalized implementation of the theory is developed in order to explore the propagation of Voigt waves in any direction. It is shown that the correlation length — a parameter characterizing the distributional statistics of the component material phases — plays a crucial role in facilitating the propagation of Voigt waves in the homogenized composite medium.

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