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Imaging ultrafast dynamics on the nanoscale with terahertz scanning tunneling microscopy

来源:
报告题目   Imaging ultrafast dynamics on the nanoscale with terahertz scanning tunneling microscopy
报告人   Prof. Frank Hegmann
报告人单位   Department of Physics, University of Alberta, Canada
报告时间   2016-12-02
报告地点   合肥微尺度物质科学国家实验室九楼会议室(9004)
主办单位   合肥微尺度物质科学国家实验室、国际功能材料量子设计中心(ICQD)
报告介绍
Abstract:
The ability to directly probe ultrafast phenomena on the nanoscale is essential to our understanding of excitation dynamics on surfaces and in nanomaterials. Recently, a new ultrafast STM technique that couples terahertz (THz) pulses to the scanning probe tip of an STM was demonstrated (THz-STM), providing simultaneous 0.5 ps time resolution and 2 nm spatial resolution under ambient laboratory conditions. This talk will discuss how THz-STM works and its potential for probing sub-picosecond dynamics on surfaces with atomic resolution.
 
Biosketch:
Prof. Frank Hegmann received his PhD in Physics from McMaster University in 1994 and then worked as a postdoctoral researcher at the Center for Terahertz Science and Technology at the University of California, Santa Barbara. In 1997, he started as an assistant professor in the Department of Physics at the University of Alberta studying ultrafast dynamics in materials using time-resolved terahertz (THz) pulse spectroscopy. He is currently a Professor in Physics and AITF Strategic Chair in Terahertz Science and Technology with research interests in THz pulse spectroscopy, ultrafast imaging, THz-STM, terahertz nonlinear dynamics, and biological effects of intense THz pulses.

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