Translation correlations in anisotropically scattering media

By Benjamin Judkewitz, Roarke Horstmeyer, Ivo M. Vellekoop, Ioannis N. Papadopoulos, Changhuei Yang. Nature Physics, 2014

224 citations recorded by the source corpus.

Controlling light propagation across scattering media by wavefront shaping holds great promise for a wide range of communications and imaging applications. But, finding the right shape for the wavefront is a challenge when the mapping between input and output scattered wavefronts (that is, the transmission matrix) is not known. Correlations in transmission matrices, especially the so-called memory effect, have been exploited to address this limitation. However, the traditional memory effect applies to thin scattering layers at a distance from the target, which precludes its use within thick scattering media, such as fog and biological tissue. Here, we theoretically predict and experimentally verify new transmission matrix correlations within thick anisotropically scattering media, with important implications for biomedical imaging and adaptive optics. Light propagating through a scattering medium exhibits correlations in the transmission matrix. A theoretical and experimental study uncovers intensity correlations that survive multiple scattering, which could be exploited for imaging.

View Paper: https://www.semanticscholar.org/paper/83ba29bf99b8971ddc6b3b68fc487d33bc91d52c

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Citations in the corpus

• Deep speckle correlation: a deep learning approach toward scalable imaging through scattering media (2018, background): “In practice, however, the SBP from this model is still small due to the limited memory effect range [11,20,48], finite sensor’s dynamic range [22], the imaging geometry [30, 36, 54], and trade-off between illumination coherence, speckle contrast, and measurement requirement [4, 9, 22,28].”
• Light fields in complex media: Mesoscopic scattering meets wave control (2017, background): “In forward scattering media such as biological tissues, a “translational” memory effect was identified: A lateral shift of the input wavefront resulted in a lateral shift of the focus (Judkewitz et al., 2015), an effect valid inside the medium rather than at a distance.”
• The generalized optical memory effect (2017, background): “(b) The anisotropic “shift” memory effect [9], where an input wavefront shift also shifts the target plane wavefront.”
• Roadmap on wavefront shaping and deep imaging in complex media (2021, methodology): “Starting with the work of Feng et al in 1988 [141], where the first speckle correlations were described and classified, there has been a lot of interest in the properties of speckles, and in recent years a number of new correlations have been characterized, from the ‘tilt–tilt’ memory effect [161] t”