Department of Physics, Philipps University of Marburg, Germany

报告摘要：

Electron transfer processes at surfaces and interfaces play a crucial role in diverse fields of materials sciences. In this talk, I will discuss experiments conducted in the framework of the Collaborative Research Centre “Structure and Dynamics of Internal Interfaces” (SFB 1083) in Marburg [1] by means of time- and angle-resolved photoelectron spectroscopy (tr-ARPES) and optical second-harmonic generation (SHG). Heterostructures of transition metal dichalco-genides are ideal model systems to study effects of energy level alignment and momentum mismatch on interfacial charge transfer [2,3]. Well-ordered organic layers grown on single-crystal metal substrates serve as models for contacts of organic electronic devices. A powerful new spectroscopy to investigate such systems is time-resolved photoemission orbital tomo-graphy (tr-POT) [4]. As an outlook, I will discuss, how strong THz driving fields and subcycle time resolution [5] may enable tr-POT to monitor surface bond formation in real time.

[1] https://www.internal-interfaces.de/ 
[2] J. Zimmermann et al., ACS Nano 15, 14725 (2021)
[3] R. Wallauer et al., Nano. Lett. 21, 5867 (2021)
[4] R. Wallauer et al., Science 371, 1056 (2021)
[5] S. Ito et al., Nature 616, 696 (2023) 

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 adjunct professor of the University of Regensburg. Presently, he is serving as the chair of the surface science division of the German Physical Society. 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).

希望与Hoefer教授进行一对一交流的老师和学生，可与王亚娴（yaxianw@iphy.ac.cn）预约10月16-17日的时间。客座办公室：M1019A

邀请人：孟 胜 研究员

联系人：张坚地 研究员