Path-length-resolved dynamic light scattering: modeling the transition from single to diffusive scattering

被引：65

作者：

Wax, A ^{[1
]}

Yang, CH ^{[1
]}

Dasari, RR ^{[1
]}

Feld, MS ^{[1
]}

机构：

[1] MIT, Spect Lab, Cambridge, MA 02139 USA

来源：

APPLIED OPTICS | 2001年 / 40卷 / 24期

关键词：

D O I：

10.1364/AO.40.004222

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Dynamic light-scattering spectroscopy is used to study Brownian motion within highly scattering samples. The fluctuations of the light field that is backscattered by a suspension of polystyrene microspheres are measured as power spectra by use of low-coherence interferometry to obtain path-length resolution. The data are modeled as the sum of contributions to the detected light weighted by a Poisson probability for the number of events that each component has experienced. By analyzing the broadening of the power spectra as a function of the path length for various sizes of particles, we determine the contribution of multiple scattering to the detected signal as a function of scattering anisotropy. (C) 2001 Optical Society of America.

引用

页码：4222 / 4227

页数：6

共 16 条

[1]

Berne P., 1976, Dynamic Light Scattering

[2] Path-length-resolved dynamic light scattering in highly scattering random media: The transition to diffusing wave spectroscopy [J].