Collqouium - Zenghu Chang (University of Central Florida) - The Attosecond Frontier: Studying Electronic Motion by Absorption

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Zenghu Chang
November 24, 2015
4:00PM - 5:00PM
Location
1080 Physics Research Building - Smith Seminar Room - reception at 3:45pm in the Atrium

Date Range
Add to Calendar 2015-11-24 16:00:00 2015-11-24 17:00:00 Collqouium - Zenghu Chang (University of Central Florida) - The Attosecond Frontier: Studying Electronic Motion by Absorption

Attosecond light pulses have enabled the study of electron-electron interaction on its natural time scale for the first time. Attosecond spectroscopy has so far focused on time-resolved measurement of free electrons ionized by an isolated attosecond pulse in the presence of an external infrared laser field. However, observation and control of attosecond dynamics in atoms, molecules and condensed matter requires access to the bound electrons. I will present attosecond transient absorption measurements of bound state dynamics in noble gas atoms and hydrogen molecules, uncovering fast laser-induced dynamics in the electronic and vibrational wavepacket motion which evolve on the attosecond to few-femtosecond timescale. I will also introduce the next generation attosecond light sources currently being developed.

1080 Physics Research Building - Smith Seminar Room - reception at 3:45pm in the Atrium Department of Physics physics@osu.edu America/New_York public
Description

Attosecond light pulses have enabled the study of electron-electron interaction on its natural time scale for the first time. Attosecond spectroscopy has so far focused on time-resolved measurement of free electrons ionized by an isolated attosecond pulse in the presence of an external infrared laser field. However, observation and control of attosecond dynamics in atoms, molecules and condensed matter requires access to the bound electrons. I will present attosecond transient absorption measurements of bound state dynamics in noble gas atoms and hydrogen molecules, uncovering fast laser-induced dynamics in the electronic and vibrational wavepacket motion which evolve on the attosecond to few-femtosecond timescale. I will also introduce the next generation attosecond light sources currently being developed.