Abstract
We demonstrate experimentally that optical phase conjugation can be used to focus light through strongly scattering media even when far less than a photon per optical degree of freedom is detected. We found that the best achievable intensity contrast is equal to the total number of detected photons, as long as the resolution of the system is high enough. Our results demonstrate that phase conjugation can be used even when the photon budget is extremely low, such as in high-speed focusing through dynamic media or imaging deep inside tissue.
- Received 5 October 2016
DOI:https://doi.org/10.1103/PhysRevLett.118.093902
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
© 2017 American Physical Society
Physics Subject Headings (PhySH)
Focus
Reversing Light Scattering with a Handful of Photons
Published 3 March 2017
When a beam of light is sent through a nearly opaque material, the scattered light that emerges can be unscrambled even with relatively few photons detected.
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