In situ characterization of laser-induced strong field ionization phenomena
1Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
Light, Science & Applications
|April 21, 2025
Summary
Accurate characterization of strong-field femtosecond pulses is vital for attosecond science. This study introduces a novel in situ method to measure and control pulse intensity and duration within the interaction volume, improving experimental accuracy.
Area of Science:
- Quantum Optics
- Attosecond Science
- Laser Physics
Background:
- Accurate characterization of strong-field femtosecond pulses is essential for advancing attosecond science and high harmonic generation (HHG) experiments.
- Current methods face limitations in precisely measuring pulse properties within the interaction volume, hindering experimental accuracy.
Purpose of the Study:
- To develop and demonstrate a novel in situ scheme for measuring and controlling the spatially resolved intensity and duration of strong-field femtosecond pulses.
- To address the bottleneck in accurate characterization within the interaction focal region for attosecond science.
Main Methods:
- Combining conjugate focal imaging with in situ ion measurements.
- Utilizing gas densities relevant to attosecond science experiments (Helium and Argon).
- Fitting experimental data to a strong-field ionization dynamic model.
Main Results:
- Achieved accurate and consistent results for pulse intensity and duration across a range of gas densities.
- Demonstrated the significance of double ionization and barrier suppression ionization in the measurements.
- Validated the method through independent measurements in Helium and Argon.
Conclusions:
- The developed in situ scheme enables precise characterization of strong-field femtosecond pulses within the interaction volume.
- Direct, spatially resolved characterization of the driving laser resolves averaging issues, enhancing the reliability of attosecond experiments.
- This technique is crucial for improving the accuracy and scope of future attosecond science research.
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