| 报告题目： |
Probe and control electronic and nuclear dynamics of molecules in strong laser fields |
| 报告人： |
吴健 |
| 报告人单位： |
华东师范大学 |
| 报告时间： |
4月15号 下午4点 |
| 报告地点： |
科技楼北410 |
| 报告摘要： |
|
| |
The intense ultrashort laser pulse can be used to probe and control the rich electronic and nuclear dynamics of molecules using the multiphoton process. It is interesting not only for the fundamental optical molecular physics, but also for the coherent control of the chemical reactions. Experimentally, the electrons and ions ejected from a molecule are measured in coincidence with the cold target recoil ion momentum spectroscopy. In this talk, we show that the attosecond dynamics of electron localization can be directly probed and controlled from the diatomic to polyatomic hydrocarbon molecules, which is recently extended to two-dimensional stage. By coherently manipulating the rotational nuclear wave packet, we impulsively align and unidirectionally rotate the molecule to a terahertz frequency. We semi-classically trace and control the vibrational motion of the nuclei by using two time-delayed ultrashort laser pulses of detuned wavelengths. Our experiments furthermore reveal the electron-nuclear energy sharing in above-threshold multiphoton ionization of a molecule, which can be controlled by manipulating the molecular orientation. |
| 报告人简介： |
|
| |
吴健，现任华东师范大学，精密光谱科学与技术国家重点实验室教授。2002年本科毕业于华东师范大学物理系，2007年在华东师范大学获得光学博士学位。2005至2006年在美国罗切斯特大学访学，2010年至2012年作为洪堡学者在德国法兰克福大学从事合作研究。2007年7月聘为副教授留校工作，2010年破格晋升为教授。2014年获得国家杰出青年科学基金资助。吴健主要从事分子超快行为精密测量与控制的实验研究，近年来在Physical Review Letters和Nature子刊等国际一流学术刊物发表SCI 论文90余篇。 |
