Photon diffusion coefficient in an absorbing medium.
Photon diffusion coefficient in an absorbing medium.
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DOI：
10.1364/josaa.16.001066
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发表时间：
1999-05
期刊：
影响因子：
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通讯作者：
Raphael Aronson;Noel Corngold
中科院分区：
文献类型：
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作者：
Raphael Aronson;Noel Corngold
最近，一些研究人员声称，基于输运理论的分析和基于输运理论的蒙特卡罗计算，光子迁移的扩散系数应该与吸收无关。我们发现这些分析是有缺陷的，并且从输运理论中提取扩散理论的正确方法给出了一个依赖于吸收的扩散系数。关于扩散系数是否依赖于吸收，两组不同研究人员的实验得出了相互矛盾的结果。理论与早期实验之间的差异构成了一个有趣的挑战。
A number of investigators have recently claimed, based on both analysis from transport theory and transport-theory-based Monte Carlo calculations, that the diffusion coefficient for photon migration should be taken to be independent of absorption. We show that these analyses are flawed and that the correct way of extracting diffusion theory from transport theory gives an absorption-dependent diffusion coefficient. Experiments by two different sets of investigators give conflicting results concerning whether the diffusion coefficient depends on absorption. The discrepancy between theory and the earlier set of experiments poses an interesting challenge.