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Wave propagation dynamics inside a complex scattering medium by the temporal control of backscattered waves

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Title
Wave propagation dynamics inside a complex scattering medium by the temporal control of backscattered waves
Author(s)
Ye-Ryoung Lee; Wonjun Choi; Seungwon Jeong; Sungsam Kang; Dong-Young Kim; Wonshik Choi
Publication Date
2023-05
Journal
Optica, v.10, no.5, pp.569 - 577
Publisher
Optica Publishing Group (formerly OSA)
Abstract
Shaping the wavefront of an incident wave to a complex scattering medium has demonstrated interesting possibilities, such as sub-diffraction wave focusing and light energy delivery enhancement. However, wavefront shaping has mainly been based on the control of transmitted waves that are inaccessible in most realistic applications. Here, we investigate the effect of maximizing the backscattered waves at a specific flight time on wave propagation dynamics and energy transport. We find both experimentally and numerically that the maximization at a short flight time focuses waves on the particles constituting the scattering medium, leading to the attenuation of the wave transport. On the contrary, maximization at a long flight time induces constructive wave interference inside the medium and thus enhances wave transport. We provide a theoretical model that explains this interesting transition behavior based on wave correlation. Our study provides a fundamental understanding of the effect of wave control on wave dynamics inside scattering medium. © 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
URI
https://pr.ibs.re.kr/handle/8788114/13940
DOI
10.1364/OPTICA.480154
ISSN
2334-2536
Appears in Collections:
Center for Molecular Spectroscopy and Dynamics(분자 분광학 및 동력학 연구단) > 1. Journal Papers (저널논문)
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