Chromato-axial memory effect through a forward-scattering slab

Chromato-axial memory effect through a forward-scattering slab

Light propagation through scattering samples involves long optical path lengths typically resulting in short spectral correlation widths. Here, we demonstrate experimentally and theoretically a chromato-axial memory effect through volumetric forward-scattering slabs of thickness lying in the range b...

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Veröffentlicht in:Optica 2020-04, Vol.7 (4), p.338
Hauptverfasser: Zhu, Longdi, Boutet de Monvel, Jacques, Berto, Pascal, Brasselet, Sophie, Gigan, Sylvain, Guillon, Marc
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container_issue 4
container_start_page 338
container_title Optica
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creator Zhu, Longdi
Boutet de Monvel, Jacques
Berto, Pascal
Brasselet, Sophie
Gigan, Sylvain
Guillon, Marc
description Light propagation through scattering samples involves long optical path lengths typically resulting in short spectral correlation widths. Here, we demonstrate experimentally and theoretically a chromato-axial memory effect through volumetric forward-scattering slabs of thickness lying in the range between the scattering mean free path and the transport mean free path: a spectral shift of the impinging collimated beam results in an axial homothetic dilation of the speckle pattern over large spectral widths. The center of the homothety is shown to lie at a virtual plane located at 1 / ( 3 n ) of the slab thickness L , before the output surface. These results provide new tools to blindly control wavefields through scattering samples.
doi_str_mv 10.1364/OPTICA.382209
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title Chromato-axial memory effect through a forward-scattering slab
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