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Polarized light propagation through scattering media: time-resolved Monte Carlo simulations and experiments

机译：偏振光通过散射介质的传播：时间分辨的蒙特卡洛模拟和实验

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摘要

A study of polarized light transmitted through randomly scattering media of a polystyrene-microsphere solution is described. Temporal profiles of the Stokes vectors and the degree of polarization are measured experimentally and calculated theoretically based on a Monte Carlo technique. The experimental results match the theoretical results well, which demonstrates that the time-resolved Monte Carlo technique is a powerful tool that can contribute to the understanding of polarization propagation in biological tissue. Analysis based on the Stokes-Mueller formalism and the Mie theory shows that the first scattering event determines the major spatial patterns of the transmitted Stokes vectors. When an area detected at the output surface of a turbid medium is circularly symmetrical about the incident beam, the temporal profile of the transmitted light is independent of the incident polarization state. A linear relationship between the average order of the scatters and the light propagation time can be used to explain the exponential decay of the degree of polarization of transmitted light.
机译：描述了对通过聚苯乙烯-微球溶液的随机散射介质传输的偏振光的研究。 Stokes向量的时间分布和极化程度是根据蒙特卡罗技术进行实验测量和理论计算的。实验结果与理论结果非常吻合，这表明时间分辨蒙特卡洛技术是一种强大的工具，可有助于理解生物组织中的极化传播。基于Stokes-Mueller形式主义和Mie理论的分析表明，第一次散射事件确定了所传输的Stokes向量的主要空间模式。当在混浊介质的输出表面处检测到的区域相对于入射光束圆形对称时，透射光的时间分布与入射偏振态无关。散射的平均阶数与光传播时间之间的线性关系可以用来解释透射光的偏振度的指数衰减。

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