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Disentangling Spectral Phases of Interfering Autoionizing States from Attosecond Interferometric Measurements
Lou Barreau1, C Leon M Petersson2, Markus Klinker2
1LIDYL, CEA, CNRS, and Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
Physical Review Letters
|July 27, 2019
Summary
Researchers measured spectral phases of Neon autoionizing states using attosecond interferometry and theory. They developed a method to extract individual resonance phases, crucial for understanding electron wave packets in complex systems.
Area of Science:
- Atomic Physics
- Quantum Mechanics
- Attosecond Science
Background:
- Autoionizing states in atoms are crucial for understanding electron dynamics.
- Coherent population of multiple resonances complicates phase determination.
- Accurate spectral phase information is vital for reconstructing electron wave packets.
Purpose of the Study:
- To determine spectral phases of Neon autoionizing states.
- To investigate the complex phase behavior due to resonance interference.
- To develop a method for extracting individual resonance phases from experimental data.
Main Methods:
- Extreme ultraviolet and mid-infrared attosecond interferometric measurements.
- Ab initio full-electron time-dependent theoretical calculations.
- Extension of the Fano model for atomic resonances.
Main Results:
- Spectral phases of Neon autoionizing states were determined.
- Complex phase behavior was observed as a function of photon energy.
- A method was successfully demonstrated to obtain individual resonance phases.
Conclusions:
- Individual resonance phases can be extracted despite complex interference patterns.
- The developed method extends the Fano model's applicability.
- This work enables coherent electron wave packet reconstruction in larger atomic systems.
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