Nonlinear optical responses and relaxation processes of photo-carriers in open-shell π-electronic systems

开壳 π 电子系统中光载流子的非线性光学响应和弛豫过程

• 批准号: 22340079
• 负责人: KISHIDA Hideo
• 金额: $ 12.73万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22340079/
• 关键词: 光物性; 共役系高分子; 開殻電子系; ドーピング; イオン液体; ポンププローブ分光; 非線形光学; 緩和過程; 開殻π電子系

We have investigated the nonlinear optical properties of two open-shell π-electronic systems: doped π-conjugated polymers and biradical molecular compounds. The chemical doping to the conjugated polymers give s rise to the formation of polarons. We performed pump-probe spectroscopy for the doped states of conjugated polymers and revealed that the doping drastically shortens the relaxation time. The pump-probe spectra clarified the interaction of the chemically induced polaron states and the photo-induced species. In the biradical molecular compounds, we revealed the enhanced third-order optical nonlinearity using the third-harmonic generation spectroscopy . Moreover, the experimental results by electromodulation spectroscopysuggest the enhancement mechanism of optical nonlinearity resulting from the degeneracy of the excited states.

本文研究了两种开壳层π电子体系：掺杂π共轭聚合物和双自由基分子化合物的非线性光学性质。对共轭聚合物的化学掺杂引起极化子的形成。我们进行了泵浦-探测光谱的共轭聚合物的掺杂状态，并揭示了掺杂大大缩短弛豫时间。泵浦-探测光谱阐明了化学诱导极化子态与光诱导物种之间的相互作用。在双自由基分子化合物中，我们利用三次谐波产生光谱揭示了增强的三阶光学非线性。此外，电调制光谱的实验结果表明，激发态的简并性导致了光学非线性的增强机制。

项目成果

Terahertz complex conductivities of carriers with partial localization in doped polythiophenes

掺杂聚噻吩中部分局域载流子的太赫兹复电导率

• DOI: 10.1063/1.3466916
• 发表时间: 2010
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Takeya Unuma;Kenji Fujii;Hideo Kishida;and Arao Nakamura
• 通讯作者: and Arao Nakamura

環状チアジルバイラジカル化合物 NTの非線形光学特性と電子構造

环状噻唑基双自由基化合物NT的非线性光学性质和电子结构

• 发表时间: 2012
• 作者: 鷹氏啓吾;水津理恵;阿波賀邦夫;岸田英夫;中村新男
• 通讯作者: 中村新男

Femtosecond pump-probe spectroscopy in a conducting polymer, PEDOT -PSS

导电聚合物中的飞秒泵浦探针光谱，PEDOT -PSS

• 发表时间: 2010
• 作者: T. Uchida;A. Kondo;T. Koyama;H. Kishidaand A. Nakamura
• 通讯作者: H. Kishidaand A. Nakamura

Multiply-resonant nonlinear optical processes in doped polythiophenes

掺杂聚噻吩中的多谐振非线性光学过程

• DOI: 10.1063/1.3486160
• 发表时间: 2010
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Hideo Kishida;Kenichi Hibino;and Arao Nakamura
• 通讯作者: and Arao Nakamura

Femtosecond pump-probe spectroscopy in a conducting polymer, PEDOT-PSS

导电聚合物中的飞秒泵浦探针光谱，PEDOT-PSS

• 发表时间: 2010
• 作者: T.Uchida;A.Kondo;T.Koyama;H.Kishida;A.Nakamura
• 通讯作者: A.Nakamura