Multispeckle diffusing-wave spectroscopy: A tool to study slow relaxation and time-dependent dynamics
By Virgile Viasnoff, F. Lequeux, D. J. Pine. 2002
165 citations recorded by the source corpus.
A multispeckle technique for efficiently measuring correctly ensemble-averaged intensity autocorrelation functions of scattered light from nonergodic and/or nonstationary systems is described. The method employs a charge coupled device (CCD) camera as a multispeckle light detector and a computer-based correlator, and permits the simultaneous calculation of up to 500 correlation functions, where each correlation function is started at a different time. The correlation functions are calculated in real time and are referenced to a unique starting time. The multispeckle nature of the CCD camera detector means that a true ensemble average is calculated; no time averaging is necessary. The technique thus provides a “snapshot” of the dynamics, making it particularly useful for nonstationary systems where the dynamics are changing with time. Delay times spanning the range from 1 ms to 1000 s are readily achieved with this method. The technique is demonstrated in the multiple scattering limit where diffusing-wave ...
Subfields: Acoustics and Ultrasonics, Cognitive Neuroscience, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/a80da2fa45cb25122897fb3e182c49c38a44e057
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Acoustics and Ultrasonics
In Cognitive Neuroscience
In Materials Chemistry
Citations in the corpus
- Slow dynamics in glassy soft matter (2005, methodology): “Thanks to the multispeckle dynamic light scattering method [25, 26, 27, 28], the dynamics have been probed for time delays as long as tens of hours.”