![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
We report on diffraction rings and a He-Ne laser induced self-phase modulation due to photothermal effects in nematic liquid crystals (NLCs) on dye-doped polymer surfaces. A far-field pattern of the laser beam passed through the NLC cells depended on the polarization of the incident laser beam and the results were explained by sign of the refractive index change. Three kinds of NLCs with different nematic-isotropic transition temperatures (TNI ) were used and higher photosensitivity in low TNI of NLCs was obtained than that in high TNI of those.