Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 119, Issue 41, Pages -Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.2207089119
Keywords
wave diffusion; coherent control; remission; wavefront shaping
Categories
Funding
- Office of Naval Research (ONR) [N00014-20-1-2197]
- NSF [DMR-1905465, DMR-1905442, OAC-1919789, ECCS-2146021]
- LABEX WIFI (Laboratory of Excellence within the French Program Investments for the Future) [ANR-10-LABX-24, ANR-10-IDEX-0001-02 PSL*]
Ask authors/readers for more resources
This study demonstrates that wavefront shaping can enhance the remission of light in diffusive media, with a maximum enhancement of up to 10 transport mean free paths. A theoretical model is developed to predict the maximal remission enhancement, and the analysis shows a significant improvement in the sensitivity of remitted waves to local changes of absorption deep inside diffusive media. These findings illustrate the potential importance of coherent wavefront control in noninvasive imaging applications.
Remitted waves are used for sensing and imaging in diverse diffusive media from the Earth's crust to the human brain. Separating the source and detector increases the penetration depth of light, but the signal strength decreases rapidly, leading to a poor signal-to-noise ratio. Here, we show, experimentally and numerically, that wavefront shaping a laser beam incident on a diffusive sample enables an enhancement of remission by an order of magnitude at depths of up to 10 transport mean free paths. We develop a theoretical model which predicts the maximal remission enhancement. Our analysis reveals a significant improvement in the sensitivity of remitted waves to local changes of absorption deep inside diffusive media. This work illustrates the potential of coherent wavefront control for noninvasive diffuse wave imaging applications, such as diffuse optical tomography and functional near-infrared spectroscopy.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available