A new stochastic differential equation approach for waves in a random medium

Details A new stochastic differential equation approach for waves in a random medium A new stochastic differential equation approach for waves in a random medium

2008-07-17

arxiv.org/abs/0807.2684v1

Physics

Optics

Scientific paper

10.1103/PhysRevE.79.036606

We present a mathematical approach that simplifies the theoretical treatment of electromagnetic localization in random media and leads to closed form analytical solutions. Starting with the assumption that the dielectric permittivity of the medium has delta-correlated spatial fluctuations, and using the Ito lemma, we derive a linear stochastic differential equation for a one dimensional random medium. The equation leads to localized wave solutions. The localized wave solutions have a localization length that scales inversely with the square of the frequency of the wave in the low frequency regime, whereas in the high frequency regime, this length varies inversely with the frequency to the power of two thirds.

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