It is known that intense laser radiation can produce motion of particles of micron or sub-micron size in suspensions. Such a light-induced motion is of practical importance for future medical and industrial applications of the effect. In dilute suspensions, the motion of suspended particles can be viewed by a microscope while in concentrated suspensions this is made impossible by multiple scattering of light on the particles. We propose to use the methods of optical correlation spectroscopy to acquire information about laser- induced particle flows in concentrated suspensions. We show that space-resolved measurements of time correlation function of multiply scattered light could provide both the typical velocity of laser-induced flow and the characteristic size of the flow region.

Date Published: 18 November 1999
PDF: 6 pages
Proc. SPIE 3904, Fourth International Conference on Correlation Optics, (18 November 1999); doi: 10.1117/12.370431

Published in SPIE Proceedings Vol. 3904:
Fourth International Conference on Correlation Optics
Oleg V. Angelsky, Editor(s)