Recent Advances in Photoalignment Liquid Crystal Polarization Gratings and Their Applications
Tiegang Lin, Jin Xie, Yingjie Zhou, Yaqin Zhou, Yide Yuan, Fan Fan, Shuangchun Wen
Abstract
Liquid crystal (LC) circular polarization gratings (PGs), also known as Pancharatnam–Berry (PB) phase deflectors, are diffractive waveplates with linearly changed optical anisotropy axes. Due to the high diffraction efficiency, polarization selectivity character, and simple fabrication process, photoalignment LC PGs have been widely studied and developed especially in polarization management and beam split. In this review paper, we analyze the physical principles, show the exposure methods and fabrication process, and present relevant promising applications in photonics and imaging optics.
Topics & Concepts
FabricationLiquid crystalPolarization (electrochemistry)OpticsMaterials sciencePhotonicsOptoelectronicsAnisotropyDiffraction gratingDiffractionGratingPhysicsChemistryPhysical chemistryPathologyMedicineAlternative medicineLiquid Crystal Research AdvancementsOrbital Angular Momentum in OpticsOptical Coatings and Gratings