Advanced Photon Source

An Office of Science National User Facility

Nanoscience and Technology Division Seminar

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Sponsoring Division
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Shaowei Li
Start Date
Start Time
2:00 p.m.

Chemical reactions typically involve the dynamic reorganization of a large number of atoms and molecules. One persistent goal in the scientific community is to be able to visualize and manipulate individual molecules in a reaction and track their nuclear motions in real time. The combination of a femtosecond (fs) laser and a scanning tunneling microscope (STM) is believed to be the ultimate approach to achieve simultaneous spatial and temporal resolutions. The coupling of femtosecond laser pulses to the tunneling electrons breaks the diffraction limit in traditional optical microscopy and allows the detection of light-matter interaction with sub-Ångström resolution. The combination of temporal resolution of femtosecond laser and spatial resolution of STM further enables the investigation of laser coherent dynamics of single molecule with joint fs-Å sensitivity.


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