Dynamical Propagation Process of Light in 2-D Random Mediums
光在二维无序介质中的动态传播过程

The dynamical propagation process of light wave in two-dimensional random mediums was investigated using the finite difference time domain method.When a Gauss pulsed beam was introduced in a random medium,the spatial distributions of light wave in different time were simulated.The results show that when the propagation time is short,energy of the light is propagated out from the source and it propagates like a wave-front clearly.When the propagation time is getting longer,there are some energy keep diffusing out from the source,but a majority of energy is trapped in some regions of the medium step by step.It shows that with scattering time getting long the light is going to be localized in the random medium step by step.The results are coincident with the study of photon-localization base on the holistic scattering effect model in random mediums.