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Single-photon laser-enabled auger spectroscopy for measuring attosecond electron-hole dynamics
Bridgette Cooper1, Vitali Averbukh
1Department of Physics, Imperial College London, Prince Consort Road, SW7 2AZ London, United Kingdom.
Physical Review Letters
|September 10, 2013
Summary
We introduce a novel attosecond spectroscopy method to track electron-hole dynamics, specifically ultrafast hole migration. This technique uses attosecond pulses and vacuum ultraviolet probes to observe these rapid processes in molecules like glycine.
Area of Science:
- Quantum Dynamics
- Attosecond Spectroscopy
- Molecular Physics
Background:
- Ultrafast electron-hole dynamics are crucial for understanding chemical reactions.
- Inner-valence ionization creates transient holes that can migrate within molecules.
- Observing these dynamics requires high temporal resolution.
Purpose of the Study:
- To develop and simulate a new attosecond time-resolved spectroscopy technique.
- To investigate ultrafast hole migration dynamics.
- To apply the technique to glycine as a model system.
Main Methods:
- Attosecond ionization in the inner-valence region.
- Vacuum ultraviolet (VUV) probe pulses for single-photon laser-enabled Auger decay.
- Measurement of double ionization probability versus pump-probe delay.
- Ab initio calculations for theoretical validation.
Main Results:
- The proposed spectroscopy efficiently captures ultrafast inner-valence hole dynamics.
- Simulations demonstrate the technique's applicability to electron-hole dynamics.
- Detailed ab initio calculations provide insights into hole migration in glycine.
Conclusions:
- The developed attosecond spectroscopy is a powerful tool for studying ultrafast hole migration.
- This method offers a new pathway to probe electron dynamics in molecules.
- The findings advance the understanding of fundamental processes in molecular systems.
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