Coherent control of vibrational wave packet in condensed matters using amplitude- and phase-programmable pulses

使用幅度和相位可编程脉冲对凝聚态物质中的振动波包进行相干控制

• 批准号: 11440121
• 负责人: MISAWA Kazuhiko
• 金额: $ 8.58万
• 依托单位: Tokyo University of Agriculture and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11440121/
• 关键词: Phase-programmable femtosecond optical source; Chirped pulses; Wave packet; Pulse phase; Coherent control; 位相制御パルス; 分子振動波束; 周波数分解光ゲート法; フェムト秒パルス; フェムト秒; 振動波束; ポンプダンプ過程

We developed all solid-state amplitude- and phase-programmable femtoseocnd optical source. Nearly transform-limited pulses from a Ti : sapphire seed laser is delivered into a programmable phase modulator. The phase modulator is composed of a pair of grating and spherical mirror, and liquid crystal spatial light modulator (LC-SLM). The temporal profile and phase information of the femtosecond pulses can be obtained from the FROG measurement. The measured phase information is processed in a PC and fed back to the SLM for adjustment of the phase mask. A desired phase pattern will be realized through the iterative adjustment.We measured excited-state population in a cyanine dye molecule using the phase programmable optical source. Wave packet motion on the excited-state was observed to be dependent on chirp direction and rate of excitation by femtosecond pulses. Strong reduction in excited state population is efficient for negatively chirped pulses in the cyanine dye molecule, which is explained in terms of a pump-dump process.We have performed a quantum mechanical calculation for an electronic two-level system coupled to a single vibrational mode, and successfully reproduced the experimental observation.

研制了全固态振幅和相位可编程飞秒激光光源。来自钛宝石种子激光器的近变换限制脉冲被传递到可编程相位调制器中。相位调制器由一对光栅和球面镜以及液晶空间光调制器（LC-SLM）组成。FROG测量可以获得飞秒脉冲的时间轮廓和相位信息。测量的相位信息在PC中处理并反馈到SLM用于相位掩模的调整。利用相位可编程光源测量了菁染料分子的激发态布居。观察到激发态上的波包运动依赖于飞秒脉冲激发的啁啾方向和速率。对菁染料分子中的负啁啾脉冲，激发态布居的强烈减少是有效的，这可以用抽运-转储过程来解释.我们对耦合到单振动模的电子二能级系统进行了量子力学计算，成功地再现了实验观察.

项目成果

Kazuhiko Misawa: "Excited- and ground-state wave packet dynamics in organic materials induced by femtosecond chirped pulses"Proceedings of US-Japan Workshop, pp.286 (World Scientific, 2001).

Kazuhiko Misawa：“飞秒啁啾脉冲引起的有机材料中的激发态和基态波包动力学”美国-日本研讨会论文集，第 286 页（世界科学出版社，2001 年）。

K.Misawa: "Excited-and ground-State wave packet dynamics in organic materials induced by femtosecond chirped pulses"Proceedings of US-Japan Workshop. 286 (2001)

K.Misawa：“飞秒啁啾脉冲引起的有机材料中的激发态和基态波包动力学”美日研讨会论文集。

K.Misawa, T. Kobayashi: "Wave-packet dynamics in a cyanine dye molecule excited with femtosecond chirped pulses"J. Chem. Phys. 113(17). 7546-7553 (2000)

K.Misawa、T. Kobayashi：“用飞秒啁啾脉冲激发的花青染料分子中的波包动力学”J。

S.Itoh, K.Misawa, R.Lang: "Femtosecond Phase and Amplitude distortion in dielectric materials"Abstracts of International Workshop FST2001. 185 (2001)

S.Itoh、K.Misawa、R.Lang：“介电材料中的飞秒相位和振幅失真”国际研讨会 FST2001 摘要。

K.Misawa, A.Sugita, J.Janszky, M.Yamashita, T.Kobayashi: "Squeezing of a one-dimensional phonon in a halogen-bridge mixed-valence metal complex"Technical Digest of QELS'99. 165 (1999)

K.Misawa、A.Sugita、J.Janszky、M.Yamashita、T.Kobayashi：“卤素桥混合价金属配合物中一维声子的挤压”QELS99 技术文摘。