Résumé
Light propagation in complex media is a highly complex and seemingly unpredictable process, which spans a wide range of situations from white paint, milk, fog, multimode fibers, and biological tissues. Yet, it is a coherent and deterministic process. Exploiting concepts inspired by astronomy, and thanks to the emergence of wave-control devices, such as liquid crystal displays and MEMS technology, a revolution has happened in the last decade: the possibility to control light and focus it through or inside scattering materials, well beyond what was conventionally thought possible. These concepts were illustrated through some examples from the seminar speaker’s research. In particular, it was shown how the measurement of the transmission matrix of such medium allows focusing, imaging, and even arbitrary PSF generation through highly disordered media.
