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Revealing the tunneling-ionization initial position of oriented molecules with a temporal double-slit interferometer
Optics Express
|July 30, 2025
Summary
Researchers used a temporal double-slit interferometer to study laser-induced molecular tunneling ionization. They found molecular orientation affects electron wave packet phase, enabling retrieval of tunneling initial positions and revealing ionization rate correlations.
Area of Science:
- Quantum mechanics
- Strong-field physics
- Molecular physics
Background:
- Quantum tunneling is a fundamental process.
- Strong-field physics advances allow precise study of laser-induced tunneling ionization in molecules.
- Electron wave packet dynamics are crucial for understanding tunneling ionization.
Purpose of the Study:
- To probe the electron wave packet generated from strong-field-induced tunneling ionization of a molecule using a temporal double-slit interferometer.
- To investigate the influence of molecular orientation on the electron wave packet phase.
- To establish a method for retrieving the tunneling-ionization initial position of molecules.
Main Methods:
- Employing a temporal double-slit interferometer to observe electron wave packets.
- Manipulating molecular orientation relative to the laser field polarization.
- Applying the molecular strong-field approximation to analyze interference patterns.
Main Results:
- Molecular orientation significantly modifies the electron wave packet phase at the tunnel exit.
- Observed shifts in temporal double-slit interference fringes correlate with molecular orientation.
- Established a relationship between wave packet phase and tunneling-ionization initial position, enabling its retrieval.
- Found direct correlation between angular-resolved ionization rate and tunneling-ionization initial position.
Conclusions:
- Molecular orientation plays a critical role in strong-field tunneling ionization dynamics.
- Temporal double-slit interferometry is a powerful tool for probing molecular ionization processes.
- The study provides a method to determine the tunneling-ionization initial position of molecules, offering insights into molecular structure and dynamics.
