High efficiency reflective liquid crystal polarization hologram for multi-wavelengths

A method, including:

• generating a plurality of polarized beams, wherein the plurality of polarized beams include at least three circularly polarized beams, the at least three circularly polarized beams include one or more left-handed circularly polarized beams and one or more right-handed circularly polarized beams, and the at least three circularly polarized beams are configured to interfere with one another to generate a polarization interference pattern;
• exposing a polarization sensitive recording medium to the polarization interference pattern;
• and
• forming an optically anisotropic film on the polarization sensitive recording medium that has been exposed to the polarization interference pattern, wherein the optically anisotropic film includes a mixture of a host birefringent material and a chiral dopant.