Invariant Imbedding Theory of Wave Propagation in Stratified Anisotropic Media

We study wave propagation characteristics in stratified anisotropic media theoretically using the invariant imbedding method. We consider the cases where some component of the permittivity tensor is a periodic or random function of a space variable and investigate the photonic band gap structure and the Anderson localization phenomenon. We also consider the case where the tensor component in the longitudinal direction varies from positive to negative values and the associated mode conversion and resonant absorption phenomena.