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Updated: Aug 29, 2025
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Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
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Attosecond dynamics of multi-channel single photon ionization.
Jasper Peschel1, David Busto1,2, Marius Plach1
1Department of Physics, Lund University, P.O. Box 118, 22100, Lund, Sweden.
Nature Communications
|September 3, 2022
Summary
Researchers studied ultrafast photoionization dynamics in neon atoms. Using advanced interferometry, they precisely measured angular momentum channels, revealing how potential interactions influence this rapid process.
Area of Science:
- Atomic and Molecular Physics
- Ultrafast Spectroscopy
- Quantum Dynamics
Background:
- Photoionization is a fundamental and extremely rapid process in atomic and molecular physics.
- Understanding the ultrafast temporal dynamics requires detailed characterization of contributing angular momentum channels.
- Previous studies often lacked the resolution to fully disentangle these complex dynamics.
Purpose of the Study:
- To characterize the phase and amplitude of individual angular momentum channels in neon outer-shell photoionization.
- To investigate the influence of channel interference on photoionization dynamics.
- To analyze the effects of short-range, Coulomb, and centrifugal potentials on the process.
Main Methods:
- Employed a two-photon interferometry technique.
- Utilized extreme ultraviolet (XUV) and infrared (IR) ultrashort laser pulses.
- Measured channel properties as a function of kinetic energy in neon photoionization.
Main Results:
- Successfully measured the phase and amplitude of individual angular momentum channels.
- Unraveled the significant role of channel interference in the photoionization dynamics.
- Quantified the impact of various potentials (short-range, Coulomb, centrifugal) on the process.
Conclusions:
- The study provides unprecedented insight into the ultrafast dynamics of photoionization.
- The applied interferometry technique is effective for characterizing complex angular momentum interactions.
- Detailed understanding of these dynamics is crucial for advancing atomic and molecular physics research.
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