振动能量传递是分子反应动力学中很重要的一步。许多凝聚相的反应，比如火箭推进剂的激光引爆，半导体光催化，固体激光器的振动布居反转都包含能量的传递和弛豫。而这些过程往往发生在很短的时间尺度上，利用飞秒二维振动光谱可以对这些振动模式进行振动激发，并随之追踪探测振动频率随时间的变化，从而实时观测振动能量在分子间的传递。本申请将通过一系列实验设计，定量的研究振动能量在固体分子中的微观传递机理和传递速率，并通过降温和升温研究固体分子的转动弛豫和能量传递随温度的变化，尤其是晶型转变和相变过程中传能机理的变化。

Vibrational energy transfer is one of central issues in molecular reaction dynamics.In condensed phases,many physical or chemical processes involve vibrational energy decay or energy transfer,like laser initiated detonation,photocatalysis on semiconductor,vibrational state inversion in solid lasers. These processes occur in the very short time scale. By using femtosecond two-dimensional vibrational spectroscopy, we could excite one of the vibrational modes, and then detect the time dependent frequency changing.We can directly measure the mode-specific vibrational energy transfer rate. The objective of this proposal is to systematically and quantitatively investigate the vibrational energy transfer mechanism and transfer rate in solid state by designing a series of experiments, and to study the temperature dependent vibrational energy transfer and rotational decay, expecially the mechanism difference between phase changing and structure changing.