2020/05/31 by Shuhui Li, Simon A. R. Horsley, Tomas Tyc +2 · 1 citation
Physics and Astronomy · #physics.optics
paper · pdf · doi:10.1038/s41467-021-23729-1
published as Nature Communications 12, no. 1 (2021): 1-13 · 15 pages, 5 figures. This update is to bring the article in line with the published version
arxiv created 2021/08/08 · arxiv updated 2021/08/10
When light propagates through opaque material, the spatial information it holds becomes scrambled, but not necessarily lost. Two classes of techniques have emerged to recover this information: methods relying on optical memory effects, and transmission matrix (TM) approaches. Here we develop a general framework describing the nature of memory effects in structures of arbitrary geometry. We show how this framework, when combined with wavefront shaping driven by feedback from a guide-star, enables estimation of the TM of any such system. This highlights that guide-star assisted imaging is possible regardless of the type of memory effect a scatterer exhibits. We apply this concept to multimode fibres (MMFs) and identify a `quasi-radial' memory effect. This allows the TM of an MMF to be approximated from only one end - an important step for micro-endoscopy. Our work broadens the applications of memory effects to a range of novel imaging and optical communication scenarios.