题目报告：Plasmonic hot carriers at interfaces-nonthermal charge separation and photocatalysis

报告人：高世武 教授

报告时间：2022年5月20日 （星期五）15:30 - 17:00

报告地点：在线报告（腾讯会议ID：395-950-327）

报告摘要：

Landau damping of surface plasmons generates hot electron-hole pairs, which carry an initial energy equal to the plasmon quanta. They are believed, yet to be proved, to open potential nonthermal pathways for photovoltaic and photocatalytic applications.  In this talk, I report some latest progess of plasmon generated hot carriers in metal nanoparticles (NP) and their nonadiabatic coupling with semiconductors and adsorbed molecules at interfaces. First, for AgNP@TiO2 interface, the hot electrons and holes are found to provide two nonthermal and tunable channels for carrier injection and separation at the NP-semiconductor interfaces [1,2]. In the second part, the vibrational excitation and nonadiabatic photodissociation  (like H2 and O2) of plasmonic hot carriers are studied in an Anderson-Newns model with a resonance electron-vibrational coupling [3]. The inelastic transition rates are analyzed are compared with thermal excitations. We discuss the implications of these results to available experiments.

报告人简介：

高世武，北京计算科学研究中心(CSRC)讲席教授（2014-）。博士生导师。前瑞典哥德堡大学教授。中科院物理研究所博士(1990)， 瑞典Chalmers大学物理系助理教授（1992-1997),  Docent (1997); 哥德堡大学物理系副教授（1997-2005), 教授（2006-2014）。 研究领域：材料理论和计算物理。主要从事包括电子结构，电子激发态,  表面动力学过程的理论模拟和计算研究 。著有学术论文90篇和百科全书论著章节。

参考文献：

1.Jie Ma and Shiwu Gao, Plasmon induced electron-hole separations at the Ag/TiO2(110) interface, ACS Nano 13, 13658-13667 (2019).

2.Jie Ma, Xindan Zhang, and Shiwu Gao, Tunable electron and hole injection channels at the Al/TiO2 interface, Nanoscale 13, 14073-14080, (2021).

3.Shengxiang Wu, Yu Chen, and Shiwu Gao, Plasmonic photocatalysis with nonthermalized hot carriers, (2022) Under review.