ANOMALOUS TRANSMISSION AT OBLIQUE-INCIDENCE IN ABSORBING CHOLESTERIC LIQUID-CRYSTALS

We consider theoretically light propagation at oblique incidence in ab sorbing cholesteric liquid crystals in the Bragg mode. Using 2 x 2 mat rix procedure, we analyze the eigenmodes in terms of the forward- and backward-propagating eigenwaves inside the isotropic medium bounding t he cholesteric liquid crystal. The nature of the eigenmodes in the med ium changes continuously from the circular to the linear state with in crease in the angle of incidence. Using the appropriate eigenmodes, we studied anomalous transmission in first and second Bragg orders in th ese systems and its relevance to the reported experimental results. We find some interesting polarization features that arise as a result of the absorption in the cholesteric medium.