CAREER: Spatio-Temporal Imaging and Spectroscopy of Ultrafast Electron and Vibration Dynamics on the Nanoscale

在这个奖项中，由化学系实验物理化学计划资助，华盛顿大学的Markus Raschke教授和他的小组正在研究有关纳米限制系统的电子和振动动力学的基本问题。为了同时实现时间和纳米空间分辨率，Raschke教授和他的团队将联合收割机飞秒时间分辨光谱与光学近场显微镜技术相结合。扫描探针尖端的局部光场增强提供了必要的空间场约束。拟议的工作包括探测单个等离子体纳米晶体中的电子动力学，以深入了解不同弛豫通道的时间尺度和效率及其与结构参数的相关性。 此外，振动动力学的研究将允许区分空间和时间的消相干在分子纳米结构。这个跨学科的研究计划与其光谱学，扫描探针技术和材料科学相结合，为研究生和本科生提供了广泛的学习环境。除了实验室研究外，该奖项还支持开发新的纳米光学和光谱学研究生课程以及物理化学本科课程的纳米科学模块。 在介观长度尺度（1 - 100 nm）上的飞秒动力学的检查有助于对潜在的光学激发的基本理解，这对于功能光学材料的有针对性的设计、纳米光子器件的生产、对信号转导的改进理解以及对分子传感的改进方法是必要的。该奖项的教育方面提供了集成的开源教材，课程阅读器，免费的在线百科全书条目，并为来自西雅图教育弱势学区的学生提供暑期实习机会。

In this award, funded by the Experimental Physical Chemistry Program of the Division of Chemistry, Professor Markus Raschke and his group at the University of Washington are studying fundamental questions about the electron and vibration dynamics of nanoconfined systems. To achieve simultaneous ultrahigh temporal and nanometer spatial resolution, Professor Raschke and his group combine femtosecond time resolved spectroscopy with optical near-field microscopy techniques. The local optical field enhancement of scanning probe tips provide the necessary spatial field confinement. The proposed work includes probing the electron dynamics in individual plasmonic nanocrystals to provide insight into the time scale and efficiency of different relaxation channels and their correlation with structural parameter. In addition the study of vibrational dynamics will allow to distinguish spatial and temporal decoherence in molecular nanostructures. This interdisciplinary research program with its combination of optical spectroscopy, scanning probe techniques, and material science, provides a broad learning environment for graduate and undergraduate students. In addition to laboratory research, this award supports the development of a new nanooptics and spectroscopy graduate course and of nanoscience modules for the undergraduate curriculum in physical chemistry. The examination of the femtosecond dynamics on the mesoscopic length scale (1 -100 nm) contributes to a fundamental understanding of the underlying optical excitations that is necessary for the targeted design of functional optical materials, for the production of nanophotonic devices, for improved understanding of signal transduction, and for improved methods of molecular sensing. The educational aspects of this award provide integrated open source teaching materials, course readers, free online encyclopedia entries, and a summer internship for students from educationally disadvantaged schools districts in Seattle.