Nonlinear absorption and nonlinear refraction of self-assembled porphyrins.
Nonlinear absorption and nonlinear refraction of self-assembled porphyrins.
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DOI：
10.1021/jp061799p
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发表时间：
2006-07
期刊：
影响因子：
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通讯作者：
Zhi-bo Liu;Yizhou Zhu;Yan Zhu;Shu-qi Chen;Jian-Yu Zheng;Jianguo Tian
中科院分区：
文献类型：
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作者：
Zhi-bo Liu;Yizhou Zhu;Yan Zhu;Shu-qi Chen;Jian-Yu Zheng;Jianguo Tian
利用Z扫描技术研究了自组装卟啉在纳秒和皮秒波段的非线性折射和非线性吸收。首先，观察到自组装锌卟啉和游离碱卟啉之间的非线性折射的显着差异;然而，自组装和金属化对非线性吸收的影响很小。第二，通过添加吡啶，观察到自组装结构的单体组分的非线性吸收的增强，而它们的非线性折射率几乎保持不变，作为添加吡啶。与传统的共价键有机材料相比，金属化和配体的引入可以提供更方便的途径来改变卟啉的光学非线性。
Nonlinear refraction and nonlinear absorption of self-assembled porphyrins in the nanosecond and picosecond regimes were studied at 532 nm by the Z-scan technique. First, a marked difference in nonlinear refraction was observed between self-assembled zinc porphyrins and free base porphyrins; however, the effects of self-assembly and metallization on nonlinear absorption are small. Second, an enhancement of nonlinear absorption was observed for the monomeric components of self-assembled structures by adding pyridine, while their nonlinear refractions remained almost unchanged as pyridine was added. It is expected that the metallization and addition of ligand can provide more convenient routes to alter the optical nonlinearities of porphyrins than the modifications of molecular structures of traditional covalent-bond organic materials.