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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Excited-state absorption and sign tuning of nonlinear refraction in porphyrin derivatives
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Excited-state absorption and sign tuning of nonlinear refraction in porphyrin derivatives

机译：卟啉衍生物的非线性折射的激发态吸收和符号调谐

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摘要

The nonlinear absorptions and nonlinear refractions of free-base porphyrin (P2) and Zn-porphyrin (ZnP2) were studied using the Z-scan technique at 532 nm with different pulse durations. Both P2 and ZnP2 exhibit reverse saturated absorption attributed to excited-state absorption. The coordination of P2 by Zn ion can alter the nonlinear refraction sign from negative to positive at 4 ns pulse. The results indicate that the sign of self-lensing can be tuned by the coordination of Zn in the porphyrin derivatives. In the case of longer pulse duration, the thermal effect was enhanced to dominate the nonlinear refraction sign, leading to the negative nonlinear refraction repeated appearance.
机译：使用Z扫描技术研究了不同脉冲持续时间下的游离碱卟啉（P2）和锌卟啉（ZnP2）的非线性吸收和非线性折射。 P2和ZnP2均表现出归因于激发态吸收的反向饱和吸收。 Zn离子对P2的配位可以在4 ns脉冲时将非线性折射符号从负变为正。结果表明，可以通过卟啉衍生物中Zn的配位来调节自透镜的符号。在更长的脉冲持续时间的情况下，增强了热效应以支配非线性折射符号，从而导致负非线性折射重复出现。

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