Tracing multiple scattering trajectories for deep optical imaging in scattering media

Sungsam Kang, Yongwoo Kwon, Hojun Lee, Seho Kim, Jin Hee Hong, Seokchan Yoon () and Wonshik Choi ()
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Sungsam Kang: Institute for Basic Science
Yongwoo Kwon: Institute for Basic Science
Hojun Lee: Institute for Basic Science
Seho Kim: Institute for Basic Science
Jin Hee Hong: Institute for Basic Science
Seokchan Yoon: Institute for Basic Science
Wonshik Choi: Institute for Basic Science

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract Multiple light scattering hampers imaging objects in complex scattering media. Approaches used in real practices mainly aim to filter out multiple scattering obscuring the ballistic waves that travel straight through the scattering medium. Here, we propose a method that makes the deterministic use of multiple scattering for microscopic imaging of an object embedded deep within scattering media. The proposed method finds a stack of multiple complex phase plates that generate similar light trajectories as the original scattering medium. By implementing the inverse scattering using the identified phase plates, our method rectifies multiple scattering and amplifies ballistic waves by almost 600 times. This leads to a significant increase in imaging depth—more than three times the scattering mean free path—as well as the correction of image distortions. Our study marks an important milestone in solving the long-standing high-order inverse scattering problems.

Date: 2023
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DOI: 10.1038/s41467-023-42525-7

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