飞秒泵浦-探测技术是一种可以在原子运动时间尺度上实时观测化学反应的有力手段.利用飞秒泵浦-探测技术,可以实时观测化学反应过渡态,在分子层次上了解基元化学反应的过程和机理,从而深入地了解化学反应的本质和历程.文章介绍了飞秒泵浦-探测技术的基本原理以及在分子超快动力学研究中的应用,并结合作者所在研究小组的工作,展示了基于该技术的几种典型的飞秒光谱方法在分子超快动力学研究领域的主要成果.最后,展望了该技术的发展前景和方向.
Femtosecond pump-probe spectrometry is a powerful method that can be applied to study the dynamics of chemical bonds at the atomic level.With this technique,the ephemeral transition states of chemical reactions can be investigated in real time,and the detailed mechanism and multiple reaction paths of elementary reactions understood.A full introduction to the principle and applications of this technique in molecular ultrafast dynamics is presented.The most important research achievements based on several typical femtosecond pump-probe techniques are described.Finally,potential applications and future developments are briefly reviewed.