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Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Time-resolved quantum dynamics of double ionization in strong laser fields.
Jakub S Prauzner-Bechcicki1, Krzysztof Sacha, Bruno Eckhardt
1Instytut Fizyki Mariana Smoluchowskiego and Mark Kac Complex Systems Research Center, Uniwersytet Jagielloński, Reymonta 4, 30-059 Kraków, Poland.
Physical Review Letters
|August 7, 2007
Summary
Quantum calculations reveal how electrons escape atoms after strong laser exposure. This study tracks the process from initial ionization to two-electron escape, highlighting nonsequential double ionization dynamics.
Area of Science:
- Quantum mechanics
- Atomic physics
- Strong field physics
Background:
- Double ionization of atoms is a complex process.
- Understanding electron emission dynamics is crucial.
- Strong laser fields provide a unique environment to study these phenomena.
Purpose of the Study:
- To investigate the time evolution of double ionization in strong laser fields.
- To analyze the mechanisms of sequential and nonsequential double ionization.
- To explore the role of electron rescattering and symmetric escape.
Main Methods:
- Utilizing quantum calculations in a (1+1)-dimensional model.
- Tracing the time evolution from ground state to two-electron escape.
- Analyzing time-resolved ionization fluxes.
Main Results:
- Demonstrated the accessibility of the symmetric escape subspace, characteristic of nonsequential double ionization.
- Observed the onset of single and double ionization.
- Detailed the sequence of events during laser pulse interaction, including rescattering.
- Quantified the influence of pulse duration on ionization pathways.
- Revealed the relative contributions of sequential and nonsequential double ionization.
Conclusions:
- The study provides a detailed temporal picture of double ionization.
- Nonsequential double ionization is significantly influenced by electron rescattering and symmetric escape dynamics.
- Pulse duration plays a critical role in determining the dominance of sequential versus nonsequential pathways.
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