Nematic liquid crystal modes for Si wafer-based reflective spatial light modulators

摘要

Single-domain nematic liquid crystal(LC)devices based on either the polarization-rotation or the birefringent effect or both are inves- tigated for reflective spatial light modulators(SLMs). We evaluate each LC mode in terms of its contrast ratio, optical efficiency, operating voltage and its tolerance in cell-gap. We study the hybrid-aligned, the 0-,45- and 63.6°-twisted nematic LC modes which can be operation either normally white(NW)or normally black(NB)mode. We also include the mixed nematic and self-compensated twist nematic modes for NW and the tilted homeotropic for NB.