Nonlinear Vibronic and Electronic Spectroscopy in Molecules in the Condensed Phase (Chemistry)

这项实验物理化学补助金支持Andreas C. Albrecht教授在非线性光谱学领域的研究，这是一个涉及同时吸收多个光子的科学领域。这个项目被认为是Albrecht博士对光-物质相互作用基本方面研究的延续。他将在这里开展三个具体项目。第一个希望使用三色共振四波混合来提取构成不均匀加宽电子跃迁的振动能级的横向和纵向弛豫时间。第二项研究将从凝聚态分子溶液中产生共振三次谐波作为可行的光谱，并将其与同一系统上的三光子吸收测量相结合进行研究。最后，提出了一个实验方案来检验共振二次辐射中理论预测的光诱导额外共振。后者代表了通过控制激发光的性质来改变拉曼/共振荧光平衡的第一次尝试。

This grant in Experimental Physical Chemistry supports the research of Professor Andreas C. Albrecht in the area of nonlinear optical spectroscopy, a scientific field that is concerned with the absorption of more than one photon of light simultaneously. This project is considered a continuation of Dr. Albrecht's research on fundamental aspects of light-matter interactions. Here he will carry out three specific projects. The first hopes to use three-color resonant fourwave mixing to extract transverse and longitudinal relaxation times of vibronic levels that make up inhomogeneously broadened electronic transitions. The second will develop resonant third harmonic generation from condensed phase molecular solutions as a viable spectroscopy and study it in unison with three-photon absorption measurements on the same system. Finally an experimental project is proposed which examines light induced extra resonances in resonance secondary radiation that have been predicted theoretically. The latter represents a first attempt to alter the Raman/resonance fluorescence balance by controlling the properties of the exciting light.