Optical interaction of aminophenoxy substituted phthalocyanines with picosecond pulse trains were studied in this work. Additionally, the covalent attachments of phthalocyanines to glutathione (GSH) functionalized cadmium telluride quantum dots (CdTe QDs) were also discussed. A five-level model was applied to simplify the materials. The pulse train has 50 subpulses with 100 ps width for each one and 12 ns spacing. We simulated the dynamical interaction by solving two-dimensional paraxial filed equation coupled with the rate equations based on Crank–Nicholson numerical method. The two-step two-photon absorption (TPA) is the fundamental channel of optical absorption for long pulse trains. Our results indicated that the covalent attachments of phthalocyanines to CdTe QDs show better optical limiting effects than phthalocyanines at the same densities. The cross-sections of one-photon absorption and lifetimes of lowest triplet state as well as the intersystem crossing play important roles in optical limiting effects.

在这项工作中研究了氨基苯氧基取代的酞菁与皮秒脉冲序列的光学相互作用。此外，还讨论了酞菁与谷胱甘肽（GSH）功能化的碲化镉量子点（CdTe QDs）的共价结合。应用五级模型来简化材料。脉冲序列具有50个子脉冲，每个子脉冲的宽度为100 ps，间隔为12 ns。我们通过求解基于Crank–Nicholson数值方法的二维近轴场方程和速率方程，模拟了动力相互作用。两步两光子吸收（TPA）是长脉冲序列的光吸收的基本通道。我们的结果表明，在相同密度下，酞菁与CdTe QD的共价连接显示出比酞菁更好的光学限制效果。