名师讲座
报告题目：Time-resolved photoemission orbital tomography of molecular excitation at surfaces and interfaces
报告时间：2025-10-23 10:00
报告人： Prof. Ulrich Höfer
University of Regensburg
报告地点：翔安校区能源材料大楼3号楼会议室2
转播地点：思明校区卢嘉锡楼202报告厅，漳州校区生化主楼307教室
报告摘要：
Photoemission orbital tomography (POT) is a powerful technique, by which the electron distribution in orbitals of well-ordered molecules at solid surfaces can be imaged in momentum space. We have recently combined the method with laser-pump probe techniques and investigated the dynamics of charge transfer processes at molecular interfaces. In this talk, I will first review the basic principles of time-resolved photoemission orbital tomography (tr-POT) and briefly discuss these results. Then, I will present recent progress in imaging exciton wavefunctions in organic semiconductors. Finally, I will outline a promising strategy to time-resolve surface bond formation with tr-POT by driving the molecular frame by strong THz pulses and performing photoelectron spectroscopy with subcycle time resolution.
报告人简介：
Ulrich Höfer received his doctoral degree in physics in 1989 from the Technical University of Munich, Germany. After spending two years as a visiting scientist at the IBM Watson Research Center in Yorktown Heights, New York, he joined the Max-Planck-Institute for Quantum Optics in Garching/Munich as a group leader. In 1999, he became a full professor for experimental physics at the Philipps University of Marburg. Since 2022, he is also an adjunct professor of the University of Regensburg. Höfer’s main research interests are ultrafast processes at surfaces and interfaces. He is a pioneer of time-resolved ARPES (angle-resolved photoemission spectroscopy) and coherent light-matter interaction at surfaces. His awards include the Arnold Sommerfeld prize of the Bavarian Academy of Sciences and a Synergy Research Grant from the European Research Council (ERC).
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