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首页> 外文期刊>Optik: Zeitschrift fur Licht- und Elektronenoptik: = Journal for Light-and Electronoptic >Optical limiting property and ultrafast pump-probe study of two X-shaped oligomers with anthracene unit as a core
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Optical limiting property and ultrafast pump-probe study of two X-shaped oligomers with anthracene unit as a core

机译：光学限制性质和超快泵探针研究用蒽单元作为核心的两个X形低聚物

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摘要

Two X-shaped mull-branched oligomers based on anthracene unit were studied by open-aperture Z-scan and ultrafast pump-probe methods to elucidate the nonlinear optical absorption properties as well as intramolecular charge transfer properties of typical X-shaped oligomers. Significant enhancement on the nonlinear optical absorption property was observed for the oligomer with triphenylamine groups as terminal end of each branch. Obvious optical limiting property was observed for these X-shaped oligomers and the mechanism was attributed to the two-photon absorption process. The ultrafast dynamic of these X-shaped oligomers exhibited a fast process about several ps to build an intramolecular charge transfer state, followed by a slow process longer than 100 ps which reflecting the evolution of the intramolecular charge transfer state.
机译：通过开口孔径Z扫描和超快泵探针方法研究了基于蒽单元的两个X形Mull支化低聚物，以阐明非线性光学吸收特性以及典型X形低聚物的分子内电荷转移性能。 对于具有三苯胺基团的低聚物，观察到非线性光学吸收性能的显着增强作为每个分支的末端。 对于这些X形低聚物，观察到显而易见的光学限制性能，并且该机制归因于双光子吸收过程。 这些X形低聚物的超快动态表现出大约几个PE的快速过程，以构建分子内电荷转移状态，然后慢于100ps的慢过程，其反射分子内电荷转移状态的演变。

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