Spatio-temporal visualization of light transport in complex photonic structures

Year: 2016

Authors: Pattelli L., Savo R., Burresi M., Wiersma D.

Autors Affiliation: European Laboratory for Non-linear Spectroscopy (LENS), Università di Firenze, Sesto Fiorentino (FI), 50019, Italy; Istituto Nazionale di Ottica (CNR-INO), Firenze (FI), 50125, Italy; Dipartimento di Fisica e Astronomia, Università di Firenze, Sesto Fiorentino (FI), 50019, Italy; Laboratoire Kastler Brossel, CNRS, Université Pierre et Marie Curie, 24 rue Lhomond, Paris, 75005, France

Abstract: Spatio-temporal imaging of light propagation is very important in photonics because it provides the most direct tool available to study the interaction between light and its host environment. Sub-ps time resolution is needed to investigate the fine and complex structural features that characterize disordered and heterogeneous structures, which are responsible for a rich array of transport physics that have not yet been fully explored. A newly developed wide-field imaging system enables us to present a spatio-temporal study on light transport in various disordered media, revealing properties that could not be properly assessed using standard techniques. By extending our investigation to an almost transparent membrane, a configuration that has been difficult to characterize until now, we unveil the peculiar physics exhibited by such thin scattering systems with transport features that go beyond mainstream diffusion modeling, despite the occurrence of multiple scattering.


Volume: 5      Pages from: e16090-1  to: e16090-9

More Information: Authors wish to thank G Mazzamuto, F Utel and J Bertolotti for technical assistance and T Svensson, E Alerstam, S Gigan and P Wasylczyk for fruitful discussions. This work is financially supported by the European Network of Excellence Nanophotonics for Energy Efficiency and the ERC through the Advanced Grant PhotBots (Proj. Ref. 291349).
KeyWords: Diffusive approximation; Disordered media; Light transport; Optical gatings; Wide field imaging; Light transmission
DOI: 10.1038/lsa.2016.90

Citations: 19
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