ACCURACY OF DIFFUSING-WAVE SPECTROSCOPY THEORIES
ACCURACY OF DIFFUSING-WAVE SPECTROSCOPY THEORIES
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DOI：
10.1103/physreve.51.3350
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发表时间：
1995-04-01
影响因子：
2.4
通讯作者：
DURIAN, DJ
中科院分区：
文献类型：
--
作者：
DURIAN, DJ
随机游走的计算机模拟报告的电场自相关的光子通过多次散射板传输。结果被用来作为一个基准来判断的扩散波光谱（DWS）的竞争理论的准确性，也用于区分从扩散光子传输的近似和从连续近似，总的方波矢量传输的透射光子是成比例的，其在材料中的路径长度引入的错误。一个重要的结论是，这些错误部分抵消，给出几个百分点的精度为典型的实验情况。详细的比较作为一个函数的光学厚度，边界反射率，以及散射各向异性;准则产生的优化分析实际DWS数据在各个散射站点的动态。
Random walk computer simulations are reported for the electric field autocorrelation of photons transmitted through multiple-scattering slabs. The results are used as a benchmark for judging the accuracy of competing theories of diffusing-wave spectroscopy (DWS), and also for distinguishing between errors introduced from the approximation of diffusive photon transport and from the continuum approximation that the total square wave-vector transfer of a transmitted photon is proportional to its path length in the material. An important conclusion is that these errors partially cancel, giving accuracies on the order of a few percent for typical experimental situations. Detailed comparisons are made as a function of optical thickness, boundary reflectivity, as well as scattering anisotropy; guidelines are generated for optimizing the analysis of actual DWS data in terms of the dynamics of individual scattering sites.