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Published July 23, 2001 | Published
Journal Article Open

Mechanisms of Ultrasonic Modulation of Multiply Scattered Coherent Light: An Analytic Model


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.

Additional Information

© 2001 The American Physical Society. Received 19 January 2001; published 10 July 2001. This project was sponsored in part by National Science Foundation Grant No. BES-9734491, Texas Higher Education Coordinating Board Grant No. 000512-0123-1999, and National Institutes of Health Grants No. R29 CA68562 and R01 CA71980.

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Published - PhysRevLett.87.043903.pdf


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October 19, 2023