Marinyuk V V, Rogozkin D B
Moscow Engineering Physics Institute, National Research Nuclear University, Kashirskoe Shosse 31, 115409 Moscow, Russia.
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6 Pt 2):066604. doi: 10.1103/PhysRevE.83.066604. Epub 2011 Jun 20.
We calculate the nondiffusive contribution to the intensity of coherent backscattering from a disordered medium composed of large-scale scatterers. The wings of the coherent backscattering cone are shown to be governed by short-path waves that experience small-angle multiple scattering before and after single scattering in the backward direction. For relatively large angles θ of deviation from the backward direction, θ > λ/l(tr) (λ is the wavelength of light, l(tr) is the transport mean free path), the intensity falls off slower than θ(-1) and is directly related to a law of single scattering through small angles. Our calculations are in good agreement with experimental data for large Mie spheres.
我们计算了由大尺度散射体组成的无序介质对相干背散射强度的非扩散贡献。结果表明，相干背散射锥的侧翼由短程波主导，这些短程波在向后方向单次散射之前和之后经历小角度多次散射。对于相对于向后方向的较大偏离角θ，即θ>λ/l(tr)（λ是光的波长，l(tr)是输运平均自由程），强度下降速度比θ^(-1)慢，并且与小角度单次散射定律直接相关。我们的计算结果与大米氏球的实验数据吻合良好。
