Preparing polarization grating based on polarization holography

Polarization grating (PG) divides the incident wave into the left- and right-handed circularly polarized waves, the intensities of two waves depending on the state of polarization of incident wave. Large deflection angle of the commercial PG is usually made by the grating cascade due to the limit of grating period. While using the tensor polarization holography theory, arbitrary deflection angles of PGs have been designed, where the polarization-sensitive material phenanthraquinone-doped polymethyl methacrylate (PQ/PMMA) is utilized as the recording medium in our experiments. We have made PG with the deflection angle of 40°.