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• W2552363453 abstract "Optical time-reversal techniques are being actively developed to focus light through or inside opaque scattering media. When applied to biological tissue, these techniques promise to revolutionize biophotonics by enabling deep-tissue non-invasive optical imaging, optogenetics, optical tweezers and photodynamic therapy. In all previous optical time-reversal experiments, the scattered light field was well-sampled during wavefront measurement and wavefront reconstruction, following the Nyquist sampling criterion. Here, we overturn this conventional practice by demonstrating that even when the scattered field is under-sampled, light can still be focused through or inside opaque media. Even more surprisingly, we show both theoretically and experimentally that the focus achieved by under-sampling is usually about one order of magnitude brighter than that achieved by conventional well-sampling conditions. Moreover, sub-Nyquist sampling improves the signal-to-noise ratio and the collection efficiency of the scattered light. We anticipate that this newly explored under-sampling scheme will transform the understanding of optical time reversal and boost the performance of optical imaging, manipulation, and communication through opaque scattering media." @default.
• W2552363453 created "2016-11-30" @default.
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• W2552363453 date "2016-11-02" @default.
• W2552363453 modified "2023-09-27" @default.
• W2552363453 title "Sub-Nyquist sampling boosts targeted light transport through opaque scattering media" @default.
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• W2552363453 doi "https://doi.org/10.48550/arxiv.1611.01404" @default.
• W2552363453 hasPublicationYear "2016" @default.
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