Wavefront shaping to enhance light remission from deep inside diffusive media

Hui Cao

doi:10.1117/12.2678003

5 October 2023 Wavefront shaping to enhance light remission from deep inside diffusive media

Hui Cao

Proceedings Volume PC12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI; PC126480D (2023) https://doi.org/10.1117/12.2678003
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

Waves propagate diffusively through disordered media due to random scattering. Though most waves are reflected, only a small fraction carries information from deep inside the medium. These remitted waves are widely used for noninvasive probing from seismic interferometry to diffuse optical tomography and functional near-infrared spectroscopy. The meager signal-to-noise ratio of remitted waves eventually limits the probing depth. By tailoring spatial wavefront of a laser beam, we enhance remitted signal by an order of magnitude, and increase its sensitivity to local changes inside an opaque medium. This work illustrates the potential of coherent wavefront control for noninvasive diffuse-wave imaging applications.

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Citation Download Citation

Hui Cao "Wavefront shaping to enhance light remission from deep inside diffusive media", Proc. SPIE PC12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI, PC126480D (5 October 2023); https://doi.org/10.1117/12.2678003

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KEYWORDS

Wavefronts

Medium wave

Brain

Diffuse optical imaging

Diffuse optical tomography

Near infrared spectroscopy

Neuroimaging

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