Polarization transformer constructed from chiral slab and soft and hard surface

Plane wave reflection from soft, and hard surface coated with chiral material is analyzed for the normal incidence. The fields inside the chiral slab are presented with circularly polarized eigenwaves. The eigenwaves are not coupled at the soft and hard surface, the coupling occurs at the interface between free space and chiral medium. Reflection coefficients are calculated and the polarization properties of the reflected field are studied. The soft and hard surface coated with chiral medium can be used for applications, such as polarization transformers and twist reflectors.