Morphological effects on the third-order nonlinear optical response of polydiacetylene nanofibers
Morphological effects on the third-order nonlinear optical response of polydiacetylene nanofibers
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DOI：
10.1557/mrc.2019.97
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发表时间：
2019-09
影响因子：
1.9
通讯作者：
Haruki Maki;Rie Chiba;T. Onodera;H. Kasai;R. Sato;Y. Takeda;H. Oikawa
中科院分区：
文献类型：
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作者：
Haruki Maki;Rie Chiba;T. Onodera;H. Kasai;R. Sato;Y. Takeda;H. Oikawa
利用瞬态泵浦探测光谱和椭圆偏振光谱相结合的方法，首次测定了形貌可控聚二乙炔（PDA）纳米晶体（NCs）和形貌可控聚二乙炔纳米纤维（NFs）的三阶非线性光学敏感性。PDA纳米晶体的光能值明显优于PDA纳米晶体和/或PDA本体晶体，其激子弛豫时间为亚皮秒量级。也就是说，这是第一个揭示形态学对NLO反应影响的案例。PDA - nf具有较长的有效π共轭长度，是最有希望应用于光子器件的有机三阶NLO纳米材料之一
The third-order nonlinear optical (NLO) susceptibility for morphologically controlled polydiacetylene (PDA) nanocrystals (NCs) and PDA nanofibers (NFs) have been determined for the first time by the experimental combination of transient pump-probe spectroscopy and spectroscopic ellipsometry. The figure of the merit of PDA NFs was much superior to PDA NCs and/or PDA bulk crystals, and the excitonic relaxation time was of order of sub-pico second. Namely, this is the first case to reveal the morphological effect on NLO response. PDA NFs having the long effective π-conjugation length are one of the most promising organic third-order NLO nanomaterials toward the photonic device application