Molecular Relaxation and Radiative Processes

Shaul Mukamel得到了理论和计算化学计划的资助，继续他在分子弛豫和辐射过程领域的研究。他正在应用刘维尔空间格林函数技术来解释液体体系中的各种非线性光学和光谱现象。目前正在考虑的一些应用包括：1)液体振动光谱中的高阶回波；2)多维谱密度和光学响应的Kramers-Kronig表示；3)非线性响应函数的半经典模拟；以及4)团簇和纳米结构中受限激子的合作辐射动力学的多体格林函数方法。理论研究被用来帮助解释实验光谱数据。超快光谱学利用了光学和电子学的重大技术创新，使科学家能够在亚皮秒级别上询问分子运动。这为化学家提供了在化学反应的时间尺度上研究基本分子过程的新方法。穆卡迈尔的研究为实验观察提供了必要的理论解释。

Shaul Mukamel is supported by a grant from the Theoretical and Computational Chemistry Program to continue his research in the area of molecular relaxation and radiative processes. He is applying Liouville space Green function techniques to the interpretation of a variety of nonlinear optical and spectroscopic phenomena in liquid phase systems. A number of applications are being considered including: 1) high-order echoes in vibrational spectroscopy of liquids; 2) multidimensional spectral density and the Kramers-Kronig representation of optical response; 3) semiclassical simulation of nonlinear response functions; and 4) a many body Green function approach to cooperative radiative dynamics of confined excitons in clusters and nanostructures. The theoretical research is being used to assist in the interpretation of experimental spectroscopic data. Ultrafast spectroscopy has capitalized on major technological innovations in optics and electronics to enable scientists to interrogate molecular motions on the subpicosecond level. This has provided chemists with new ways of studying fundamental molecular processes on the time scale of a chemical reaction. Mukamel's research provides the necessary theoretical interpretation of the experimental observations.