Herein, we report the third-order nonlinear absorption and optical limiting property of fluorinated polymorphic nonlinear optical (NLO) material 1-(3,4-dimethoxyphenyl)-3-(4-fluorophenyl) prop-2-en-1-one (abbreviated as PDPFO) based on reverse saturable absorption. The FTIR studies of optically transparent PDPFO single crystals confirm the presence of various functional groups. PDPFO is optically transparent in the visible wavelength region. The open aperture Z-scan technique showed the intensity-dependent nonlinear absorption. A decrease in normalized transmittance with input intensity indicated the optical limiting behavior at the wavelength 532 nm. The excited-state absorption cross-section value (\({\sigma }_{ex}=\) 1.72 × 10^–16 cm²) is much greater than ground-state absorption cross-section value \(({\sigma }_{g}=\) 2.49 × 10^–22 cm²), suggesting that optical limiting phenomena are due to RSA.

在此，我们报告了氟化多晶型非线性光学 (NLO) 材料 1-(3,4-二甲氧基苯基)-3-(4-氟苯基) prop-2-en-1-one (缩写为 PDPFO）基于反饱和吸收。光学透明 PDPFO 单晶的 FTIR 研究证实了各种官能团的存在。PDPFO 在可见光波长范围内是光学透明的。开孔 Z 扫描技术显示出依赖于强度的非线性吸收。归一化透射率随输入强度的降低表明波长 532 nm 处的光学限制行为。激发态吸收截面值 ( \({\sigma }_{ex}=\) 1.72 × 10 ^–16 cm ²) 远大于基态吸收截面值\(({\sigma }_{g}=\) 2.49 × 10 ^–22 cm ² )，表明光学限制现象是由 RSA 引起的。