Modeling for imaging
R/T correlations and Blind Ghost Imaging
An important part of the theme’s activities concerned the study of long-range speckle correlations. This has led to major results from both fundamental and applied points of view. A collaboration with a team at Exeter enabled us to demonstrate robust correlations between reflected and transmitted speckles from disordered media [1], which was subsequently used to demonstrate a new deep imaging technique (a few transport mean-free paths), named “bling ghost imaging” [2]. At the same time, we established from a theoretical point of view how much information it is possible to acquire about the transmitted signal by processing only the reflected one [3].
Figure 1 Illustration of the bling ghost imaging experimental set-up. This is a non-invasive deep fluorescence imaging technique.
Footnotes
[1]
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Non-Gaussian Correlations between Reflected and Transmitted Intensity Patterns Emerging from Opaque Disordered Media Starshynov, I., A. M. Paniagua-Diaz, N. Fayard, A. Goetschy, R. Pierrat, R. Carminati, and J. Bertolotti Physical Review X 8, no. 2 (2018) 
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[2]
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Blind ghost imaging Paniagua-Diaz, A. M., I. Starshynov, N. Fayard, A. Goetschy, R. Pierrat, R. Carminati, and J. Bertolotti Optica 6, no. 4, 460-464 (2019)
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[3]
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Mutual Information between Reflected and Transmitted Speckle Images Fayard, N., A. Goetschy, R. Pierrat, and R. Carminati Physical Review Letters 120, no. 7 (2018)
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