Ultra high-speed optical control of the quantum wave-packets which exercises from the interaction between molecules

通过分子间相互作用实现量子波包的超高速光学控制

基本信息

批准号：
13440171
负责人：
SATO Yukinori
金额：
$ 9.28万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

This research carried out using the ultrashort pulse laser of range for the purpose of performing generation and its phase control of a molecule oscillatory wave bunch. As an object system, 2 very low temperature atom molecules (HgAr Van Dell WARUSU complex) generated in the supersonic jet are chosen. A laser pulse with a 300femto second of timerange(1femtosecond=10^<-15>second) and a main wavelength of about 254nm is irradiated at this molecule. The oscillating quantum wave bunch which consists of superposition of three oscillating peculiar states (v=3,4,5) into the potential well of the excitation electronic state (A state) of the minimum grade is generated. The probe of the result of interference of two quantum wave bunches which two optical pulses generate is carried out by the third laser pulse. It is the important part portion of this research to have developed the "ATO second phase regulator" which operates the relative phase between two laser pules in the accuracy of an about 10atto second (1 attosecond=10^<-18>second). The Quantum Interference showed interference contrast and safety very high (close to about 100%) like there is no example of a report until now. Moreover, based on the exact part optical data about the electronic state of a HgAr molecule, simulation calculation about the formation and control of a quantum wave bunch in this experiment was performed, and it used for visualization the various wave-packet models by which the principle of the wave-packet control in this molecule was interpreted and controlled.

本研究利用超短脉冲激光进行分子振荡波束的产生及其相位控制。选择超音速射流中产生的 2 个极低温原子分子（HgAr Van Dell WARUSU 复合物）作为目标系统。时间范围为300飞秒(1飞秒=10^-15秒)、主波长约为254nm的激光脉冲照射到该分子上。产生由三个振荡奇特态（v=3,4,5）叠加到最低等级激发电子态（A态）势阱中组成的振荡量子波束。通过第三激光脉冲来探测两个光脉冲产生的两个量子波束的干涉结果。本研究的重要部分是开发了“ATO第二相位调节器”，该调节器以约10阿托秒（1阿托秒=10^-18秒）的精度操作两个激光脉冲之间的相对相位。量子干涉显示出干涉对比度和安全性非常高（接近100%左右），到目前为止还没有报道的例子。此外，基于HgAr分子电子态的精确部分光学数据，对本实验中量子波束的形成和控制进行了模拟计算，并将各种波包模型进行了可视化。对该分子的波包控制原理进行了解释和控制。