Enhancement and control of coherence by degenerate-four-wave-mixing

通过简并四波混频增强和控制相干性

• 批准号: 23655011
• 负责人: NAGASAWA Yutaka
• 金额: $ 2.58万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23655011/
• 关键词: 超高速分光; フェムト秒レーザー分光; 縮退四光波混合; コヒーレント制御; 核波束運動; コヒーレント分子振動; 電荷移動反応; 電子移動反応; フェムト秒分光; 非線形分光

To accelerate the degenerate four-wave-mixing (DFWM) measurement, rapid scanning stage was introduced to the experimental setup and the signal was monitored by an oscilloscope.With this system, integration of 500 times takes only 2 minutes and the acceleration of the measurement was successful. Ultrafast DFWM measurement (pulse duration: ca. 13 fs) of oxazine 1 (Ox1) in electron donating solvent, N,N-dimethylaniline (DMA), was carried out and compared with that in an inert solvent, 1-chloronaphthalene (1-CN). In 1-CN, strong oscillation due to the coherent nuclear wavepacket motion was observed. On the other hand, in DMA, ultrafast decay within 100 fs, which is due to the charge transfer (CT) reaction, was observed and the oscillation also dephased very rapidly. By comparing the Fourier transform spectra of the signals, it was concluded that wavepacket motion in the CT state could be appearing for Ox1 in DMA.

为了加速简并四波混频（DFWM）测量，实验装置中引入了快速扫描阶段，并通过示波器监测信号。使用该系统，500次积分仅需2分钟，并且测量加速成功了。对给电子溶剂 N,N-二甲基苯胺 (DMA) 中的恶嗪 1 (Ox1) 进行超快 DFWM 测量（脉冲持续时间：约 13 fs），并与惰性溶剂 1-氯萘 (1-中）。在 1-CN 中，观察到由于相干核波包运动而产生的强烈振荡。另一方面，在 DMA 中，观察到由电荷转移 (CT) 反应引起的 100 fs 内的超快衰减，并且振荡也非常快速地失相。通过比较信号的傅里叶变换谱，得出结论：DMA中的Ox1可能出现CT状态下的波包运动。

项目成果

ベタイン誘導体の光励起状態とイオン液体の溶媒和ダイナミクス

甜菜碱衍生物的光激发态和离子液体的溶剂化动力学

• 发表时间: 2011
• 作者: 長澤裕;近藤慎;村松正康;宮坂博
• 通讯作者: 宮坂博

Solvation Dyanmics and Charge Transfer in Ionic Liquids

离子液体中的溶剂化动力学和电荷转移

• 发表时间: 2011
• 作者: Y. Yamada;K. Hongo;K. Egashira;Y. Kita;U. Nagashima;and M. Tachikawa;丹野剛紀;M. Higashi and S. Saito;Y. Nagasawa
• 通讯作者: Y. Nagasawa

Intramolecular Charge Transfer in Ionic Liquids

离子液体中的分子内电荷转移

• 发表时间: 2012
• 作者: Y. Nagasawa;S. Morishima;M. Muramatsu;T. Katayama;H. Miyasaka
• 通讯作者: H. Miyasaka

Charge-transfer dynamics of phenyleneethynylenes with conjugated fluoro-phenyl groups in ionic liquid

离子液体中具有共轭氟苯基的亚苯基亚乙炔基的电荷转移动力学

• 发表时间: 2012
• 作者: M. Muramatsu;T. Katayama;Y. Nagasawa;H. Miyasaka;D. Matsuo;Y. Suzuma;A. Orita;J. Otera
• 通讯作者: J. Otera

One-Color Reversible Control of Photochromic Reactions in a Diarylethene Derivative: Three-photon Cyclization and Two-Photon Cycloreversion by Near IR Femtosecond Laser Pulse at 1.28 μm.

二芳基乙烯衍生物中光致变色反应的单色可逆控制：1.28 μm 近红外飞秒激光脉冲的三光子环化和双光子环回。

• 发表时间: 2011
• 期刊: J. Am. Chem. Soc.
• 影响因子: 15
• 作者: K. Mori;Y. Ishibashi;H. Matsuda;S.Ito;Y. Nagasawa;H. Nakagawa;K. Uchida;S. Yokojima;S. Nakamura;M. Irie;and H.Miyasaka
• 通讯作者: and H.Miyasaka