The following seminar was held
Date and Time: August 6, 2025 (Wed.) 14:30-15:30
Venue: Room 502, Building 8, Faculty of Engineering, The Univ. of Tokyo
Speaker: Associate Professor Kunlong LIU (School of Physical Sciences, Great Bay University, Dongguan, China)
Title: Taking a snapshot of the electronic wave packet with an attosecond flash: Revealing the energy-time characteristics of photoelectrons
Timing the laser-induced ultrafast electronic dynamics without intercepting the interaction is essential for advancing attosecond physics, yet it remains a significant challenge. In this talk, I will introduce an observation scheme using isolated attosecond pulses (IAPs) for time-resolving the strong-field ionization driven by multicycle laser pulses. Our approach utilizes the interference between the electronic wave packets emitted by the driving pulse and the one produced by a time-delayed IAP. We demonstrate that the photoelectron spectral phase can be encoded in and retrieved from the spectral interference structures. Furthermore, we reveal the birth-time distributions of the photoelectrons and their distinct energy-time characteristics in multiphoton and tunneling ionization. Our study explores a promising application of IAPs for ultrafast measurement and opens a viable venue for investigating quantum dynamics with quantum phase information.
Language: English
Host Professor: Kenichi ISHIKAWA
Contact: sec-utripl@utripl.u-tokyo.ac.jp
Note: This seminar is open to the public. Participants are kindly requested to provide their name, affiliation, and email address upon registration.