Characterization of self-phase modulation in liquid crystals on dye-doped polymer films

Photothermal effects in nematic liquid crystals (NLCs) on dye-doped polymer film, which caused self-phase modulation, were investigated using Kirchhof f's diffraction integral including higher-order optical phase modulation. T he self-phase modulation was also analyzed by numerically solving a heat-co nduction equation. The photothermal effects, including dependence on the pu mp beam intensity, were successfully described with good accuracy by the he at-conduction analysis.