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Manipulation of High-Harmonic Generation Using an Engineered Two-Color Laser Field
Indrajit Kabiraj1,2, Sonali Panda1,2, Vinitha Nimma1
1Physical Research Laboratory Ahmedabad, Ahmedabad, India.
Summary
Researchers used a two-color laser field to control high-harmonic generation (HHG). By adjusting the laser
Area of Science:
- Attosecond science
- Quantum optics
- Strong-field physics
Background:
- High-harmonic generation (HHG) produces extreme-ultraviolet and soft X-ray radiation.
- Electron dynamics under strong laser fields dictate harmonic emission properties.
Purpose of the Study:
- Investigate modulation of high-order harmonic yields using a temporally engineered two-color laser field.
- Explore the influence of relative phase and intensity on HHG.
Main Methods:
- Utilized a two-color laser field composed of a 1030 nm femtosecond pulse and its 515 nm second harmonic.
- Performed semiclassical simulations to model electron trajectories and harmonic generation.
- Experimentally controlled relative phase and intensity of the two laser fields.
Main Results:
- Demonstrated strong sensitivity of harmonic generation to the relative phase and intensity of the two-color laser fields.
- Observed modulation of harmonic yields due to selective influence on tunnel ionization and electron trajectories.
- Semiclassical simulations showed good qualitative agreement with experimental observations.
Conclusions:
- Temporal engineering of laser fields offers precise control over high-harmonic generation.
- Asymmetric two-color laser fields can selectively influence electron dynamics for tailored harmonic emission.
- This approach provides a pathway for manipulating attosecond light sources.
