Manipulating light inside opaque layers

Light propagating in a layer of scattering nanoparticles, shows the principle of diffusion - like tea particles in hot water. The deeper light is penetrating into the layer, the lower the energy density. Scientists, however, manage to turn this falling diffusion curve into a rising one, by manipulating the incident light. More light energy inside an opaque layer, is the result, which could lead to solar cells or LED’s with better yields.