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- W2963115522 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 tweezing, and phototherapy. 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 scattering media. Even more surprisingly, we show both theoretically and experimentally that the focus achieved by under-sampling can be one order of magnitude brighter than that achieved under the well-sampling conditions used in previous works, where 3×3 to 5×5 pixels were used to sample one speckle grain on average. 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.
- W2963115522 created "2019-07-30" @default.
- W2963115522 creator A5008233636 @default.
- W2963115522 creator A5011213798 @default.
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- W2963115522 date "2017-01-11" @default.
- W2963115522 modified "2023-10-07" @default.
- W2963115522 title "Sub-Nyquist sampling boosts targeted light transport through opaque scattering media" @default.
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- W2963115522 doi "https://doi.org/10.1364/optica.4.000097" @default.
- W2963115522 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5493046" @default.
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