Wax A, Yang C, Dasari R R, Feld M S
Appl Opt. 2001 Aug 20;40(24):4222-7. doi: 10.1364/ao.40.004222.
Dynamic light-scattering spectroscopy is used to study Brownian motion within highly scattering samples. The fluctuations of the light field that is backscattered by a suspension of polystyrene microspheres are measured as power spectra by use of low-coherence interferometry to obtain path-length resolution. The data are modeled as the sum of contributions to the detected light weighted by a Poisson probability for the number of events that each component has experienced. By analyzing the broadening of the power spectra as a function of the path length for various sizes of particles, we determine the contribution of multiple scattering to the detected signal as a function of scattering anisotropy.
动态光散射光谱法用于研究高散射样品中的布朗运动。通过使用低相干干涉测量法测量聚苯乙烯微球悬浮液背散射光场的波动，将其作为功率谱来获得路径长度分辨率。数据被建模为对检测到的光的贡献之和，这些贡献由每个分量经历的事件数量的泊松概率加权。通过分析不同尺寸颗粒的功率谱展宽作为路径长度的函数，我们确定了多次散射对检测信号的贡献作为散射各向异性的函数。
