Sub-Nyquist sampling boosts targeted light transport through opaque scattering media.

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 c

SUBMITTER: Shen Y 

PROVIDER: S-EPMC5493046 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature