Light Induced Processes in the Condensed Phase

研究将在四个方面展开：1)近对称阱中的质子隧穿：基于我们之前对靛蓝/苯甲酸晶体的表征，该系统将用于通过窄带激光方法和皮秒泵浦探针技术研究分子晶体中的隧道动力学。2)非对称阱中的质子动力学：利用飞秒激光方法研究含有分子内氢键的分子晶体材料中质子运动的动力学性质；在质子快速运动的这类系统中，激子带的性质将被探讨。3)硅聚合物的激发动力学：采用皮秒和亚皮秒的方法研究聚硅烷长硅链上的光学激发。4)有机固体中的能量处置机制：将开展光学和红外泵浦探测实验，研究分子固体中振动热分子的冷却机制。

Research will be carried out in four areas: 1) Proton tunneling in nearly symmetric wells: based on our previous characterization of the indigo/benzoic acid crystals the system will be used to investigate tunneling dynamics in molecular crystals by means of narrow-band laser methods and picosecond pump-probe techniques. 2) Proton dynamics in asymmetric wells: femtosecond laser methods will be used to study the nature of the dynamics of proton motions in molecular crystalline materials containing intramolecular hydrogen bonds; the nature of the exciton bands in such systems which undergo rapid proton motion will be explored. 3) Dynamics of excitations in polymers of silicon: the optically generated excitations on the long silicon chains of the polysilanes will be studied by picosecond and subpicosecond methods. 4) Energy disposal mechanisms in organic solids: optical and infrared pump-probe experiments will be carried out to study the mechanisms of cooling vibrationally hot molecules in molecular solids.