Eur. Phys. J. Appl. Phys.
Volume 85, Number 3, March 2019
|Number of page(s)||8|
|Section||Imaging, Microscopy and Spectroscopy|
|Published online||26 April 2019|
Speckle decorrelation with wavelength shift as a simple way to image transport mean free path
Univ Rennes, CNRS, Institut de Physique de Rennes, UMR 6251, Rennes, France
2 Univ Rennes, CNRS, Institut FOTON, UMR 6082, Rennes, France
* e-mail: firstname.lastname@example.org
Received in final form: 8 January 2019
Accepted: 4 February 2019
Published online: 26 April 2019
We present an experimental scheme for determining the light transport properties of random disordered materials. The sample is illuminated with a laser and the speckle patterns obtained at different wavelengths are recorded with a camera. The transport mean free path is then deduced from the correlation functions of the scattered intensities. This method is tested on two kinds of random materials: colloidal particles dispersed into a polymeric matrix and on granular material made of glass beads. The possibility to image a material with a disorder varying at large scale is finally presented.
© A. Mikhailovskaya et al. published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.