Polymer-Network 90°-Twisted Nematic Liquid Crystals with Spatially Partitioned Alignment for Linear-Polarization Rotation

We propose a spatial linear-polarization rotation scheme based on polymer-network 90° twisted nematic liquid crystals (PN-90°-TNLCs). By doping LC monomers into 90°-TNLCs and sequentially applying different electric voltages under simultaneous UV exposure, a PN-90°-TNLC cell with spatially partitioned LC alignment distributions is fabricated. This approach enables straightforward and stable generation of 1D and 2D spatial linear-polarization distributions. The polarization rotation angle of the output light, induced by the PN structures, remains stable after the electric stimuli are removed, demonstrating strong potential for optical information storage.