A tunable liquid crystal polarization converter based on hybrid alignment with a deeply rubbed polyimide surface

This work demonstrates a tunable liquid crystal polarization converter (LCPC) constructed using two conductive glass substrates that are treated with homogeneous alignment and azimuthal alignment, respectively. The surface is deeply rubbed to enhance the performance tilted LC molecules compared surface. layer initially presents twisted-azimuthal texture, which capable of converting linear (radial) when direction incident light set parallel (perpendicular) homogenously aligned directors. If in an electric field, will be realigned by deep rubbing grooves present can convert axial polarization. Additionally, increasing voltage enables reorientate along field lose effect, such operation switch off LCPC.