基于旋转相干光谱的整形飞秒激光转动动力学调控

Control of rotational dynamics based on rotational coherent spectroscopy using shaped femtosecond laser

我们实验上发展了基于飞秒激光旋转相干光谱的整形飞秒激光转动动力学调控方法,通过脉冲整形技术调控激发脉冲的光谱相位,从而实现对飞秒激光作用下转动态相干激发过程中复原信号及转动布居数的调控.研究了飞秒激光旋转相干光谱对激光频谱相位的响应机制,突出了飞秒激光频谱相位在气相分子转动态相干激发中的重要作用.为飞秒激光作用下生物大分子和团簇鉴别及结构探测研究提供了新的参考.

We experimentally develop a method for controlling the rotational dynamics using shaped femtosecond laser pulse based on rotational coherent spectroscopy.The pulse shaping technique is used to modulate the spectral phase of the excitation pulse,and we can achieve the manipulation of the revival signal and rotational population during the rotational coherent excitation.The response mechanism of femtosecond laser rotational coherent spectroscopy to the phase of the laser spectrum is investigated,and the role of the laser spectrum phase in the rotational dynamic coherent excitation of gas molecules is highlighted.It provides a new reference for the identification and structure detection of biological macromolecules and clusters for the femtosecond laser pulse.