名师讲座
报告题目：Ultrafast Spectroscopy of Single Plasmonic Nanostructures
报告时间：2024-05-13 11:00
报告人： Prof.Gregory Hartland
University of Notre Dame, Physical Chemistry C.执行主编
报告地点：卢嘉锡楼202报告厅
转播地点：翔安校区能源材料大楼3号楼会议室5，漳州校区生化主楼307教室
报告摘要：
Metal nanostructures display several types of resonances. In the visible and near-IR spectral regions, there are localized surface plasmon resonances (LSPRs) that involve the coherent oscillation of the conduction electrons. Extended metal nanostructures, such as nanowires or nanoplates, also exhibit propagating surface plasmon polaritons (SPPs), which are motions of the electrons at the surface of the structure that have a well-defined momentum. In addition, the vibrational modes of metal nanostructures give rise to low frequency resonances in the GHz to THz range. These different types of resonances suffer energy losses from internal effects and from interactions with the environment. The goal of this talk is to describe the part of the energy relaxation process due to the environment. Even though plasmons and acoustic vibrations arise from very different physics, it turns out that damping is dominated by radiation of waves. The way the rates for radiation damping depend on the size of the nanostructure and the properties of the environment will be discussed. Examples of applications enabled by the control of radiation damping will also be discussed, such as the use of metal nanostructures as nanoscale mass balances.
Journal of Physical Chemistry系列期刊创建于1896年，迄今拥有128年的历史，是物理化学领域内第一本英文期刊，目前年均发文量为6,500多篇，在物理化学相关领域拥有广大的作者及读者群体。JPCC主要发表与能源、材料、催化相关的实验及理论计算研究。Gregory Hartland 教授作为JPCC执行主编，将为师生们介绍期刊情况以及各类专辑。
报告人简介：
Prof. Gregory Hartland obtained a Ph.D. from UCLA in 1991, and performed postdoctoral studies at the University of Pennsylvania from 1991-1994 with Prof. Hai-Lung Dai before joining the Department of Chemistry and Biochemistry at the University of Notre Dame. His research interests are in the development and application of novel spectroscopic techniques to study energy relaxation processes in single nanostructures. Prof. Hartland is a Fellow of the AAAS, the American Chemical Society and the Royal Society of Chemistry, and is the Deputy Editor for the Journal of Physical Chemistry C.
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