Sommaire:

We will present recent results in light scattering and transport in disordered media in which unexpected behaviors show up. In light transport (diffusion), we will discuss an invariance property that has been demonstrated recently, showing that the averaged path length in the scattering process is independent on the microstructure of the medium. In the context of imaging through opaque scattering media, we will show that a spatial correlation between the reflected and transmitted speckle patterns exists, and persists even in the multiple scattering regime. The mutual information connecting the transmitted and reflected speckles can be estimated, providing an interesting connection between concepts of information theory and mesoscopic physics. Finally, we will discuss the influence of spatial correlations in the disorder. In the case of hyperuniform disorder (a specific class of correlated disorder) we will show that correlations can induce transparency even in the multiple scattering regime. These results bring new perspectives for the design of disordered materials with specific photonic properties, and for the control of light transport in complex media.

Pour plus d'informations, merci de contacter Berthier L.