Coherent backscattering enhancement in medium with variable refractive index

Coherent backscattering enhancement in refracting media: diffusion approximation

“…Detailed discussion of this approximation can be found in [13] and references therein. In [14], a weak localization effect has been simulated by the finitedifference numerical solution of the radiative transfer equation in refracting medium [15] …”

“…(2) in [14], has been numerically solved with the upwinddifference scheme [16]. Here, Λ μ s ∕μ a μ s is the single scattering albedo of the medium, ε μ a μ s , μ a , and μ s are the volume absorption and scattering coefficients, respectively, and γ ∂ ln nz∕∂z.…”

Weak Localization in Media with Refractive-Index Gradient: the Diffusion Approximation

“…In this paper, following [7,8], we restrict ourselves to considering the refractive index of the form…”

“…First analytical and numerical results on weak localization in inhomogeneous media have recently been published [7,8]. In the case of a strongly elongated scattering indicatrix, asymptotic solutions of the scalar radiative transfer equation in the low-angle approximation were obtained for the main fundamental types of sources, including planar monodirected, point monodirected, and point isotropic ones [7].…”

“…In the case of a strongly elongated scattering indicatrix, asymptotic solutions of the scalar radiative transfer equation in the low-angle approximation were obtained for the main fundamental types of sources, including planar monodirected, point monodirected, and point isotropic ones [7]. On the basis of these results, the well-known asymptotic expressions for the peripheral regions of the coherent backscattering cone [9] were extended to the case of inhomogeneous media.…”