Presidential Young Investigator Award

将在总统青年调查员奖的帮助下探讨三个专题。1.利用非线性光学光谱学研究固体-固体界面的性质。通过将两束光照射到异质结(例如硅化镍/硅)上而产生的和频信号将被测量，以便探测界面电子结构。2.采用一种新的动态光散射技术(漫射波谱)来研究颗粒在稠密胶体悬浮液中的运动和光的传输。3.与清洁金属表面(如钴和铂)上吸附的分子有关的过程，如能量转移、脱相和分子运动，将用超快红外光谱方法进行研究。

Three topics will be pursued with the aid of the Presidential Young Investigator award. 1. Nonlinear optical spectroscopy will be used to investigate the properties of solid-solid interfaces. The sum-frequency signal generated by shining two beams of light onto a heterojunction (e.g., nickel silicide/silicon) is to be measured in order to probe the interfacial electronic structure. 2. A new technique in dynamical light scatteirng (diffusing wave spectroscopy) will be employed to study particle motion and the transport of light in dense colloidal suspensions. 3. Processes associated with adsorbed molecules on clean metal surfaces (e.g., cobalt and platinum), such as energy transfer, dephasing, and molecular movements, are to be investigated by ultrafast infrared spectroscopic methods.