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Diffuse light scattering : from fundamental optics to new tools in soft matter physics

Frank Scheffold

Mercredi 3 mars 2010

Mercredi 3 mars, à 11h en salle C. Brot

Disordered non-absorbing media usually appear « white » owing to the strong multiple scattering of light. Examples are common in everyday live such as fog, milk, sand and white paint. When light is entering such a medium scattering events disperse the beam and a "cloud" of light is formed. Eventually the transport of light becomes diffusive. Understanding this diffuse light propagation and the underlying scattering processes is of great importance. In my presentation I will illustrate this with a few recent examples taken from our own research. I will show that using similar concepts it is possible to address scientific problems in different areas such as soft matter physics, biomedical imaging and the physics of mesoscopic transport and light localization. Particular attention will be given to the interplay between the material properties on a nano- and micron scale and the transport of light. With specific nano-scale structures, ordered and disordered, it is possible to manipulate the flow of light. A better understanding of these phenomena can then be exploited for the design of improved optical reflectors, filters or particle based displays.

Physics Department and Fribourg Center for Nanomaterials, Soft Matter and Photonics Group, University of Fribourg