Mechanisms of ultrasonic modulation of multiply scattered coherent light: An analytic model
Mechanisms of ultrasonic modulation of multiply scattered coherent light: An analytic model
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DOI：
10.1103/physrevlett.87.043903
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发表时间：
2001-07-23
影响因子：
8.6
通讯作者：
Wang, LHV
中科院分区：
文献类型：
--
作者：
Wang, LHV
基于超声调制折射率和超声调制瑞利散射体位移两种机制，建立了散射介质中多次散射相干光的超声调制解析模型。例如，在水溶液中，当散射平均自由程小于声波波长的临界分数(0.0890)时，第一种机制的重要性略低于第二种机制，超过这一点后，它变得越来越重要。该模型与一个独立的蒙特卡罗模型符合得很好。
An analytic model of the ultrasonic modulation of multiply scattered coherent light in scattering media is developed based on two mechanisms: the ultrasonic modulation of the index of refraction and the ultrasonic modulation of the displacements of Rayleigh scatterers. In water solutions, for example, the first mechanism is slightly less important than the second mechanism when the scattering mean free path is less than a critical fraction (0.0890) of the acoustic wavelength, and it becomes increasingly more important beyond this point. This model agrees well with an independent Monte Carlo model.