Scattering of light in the presence of nano-structured materials, i.e. with features in the order of the wavelength of the light or smaller, reveals details of how light interacts with matter at... Show moreScattering of light in the presence of nano-structured materials, i.e. with features in the order of the wavelength of the light or smaller, reveals details of how light interacts with matter at the nanoscale. In this dissertation we present four cases of light scattering on nano-structures. First we describe how light confined in 2D structures, namely a dielectric membrane and a metal layer, interacts with either a single nano-hole or a hole-array. Then, we study two cases of light propagating in random scattering media: we show how phase modulation can be used to measure scattering properties in a volume scatterer (e.g. white paint), and we investigate light transport in a rough thin-film silicon solar cell. Show less