Semi-classical approach to compute RABBITT traces in multi-dimensional complex field distributions

Area of Science:

• Quantum Optics
• Attosecond Science
• Electron Dynamics

Background:

• Attosecond pulse trains are crucial for probing ultrafast electron dynamics.
• Accurate modeling of electron spectra requires considering complex laser field properties.
• Reconstruction of Attosecond Beating By Interference of Two-photon Transitions (RABBITT) is a key technique.

Purpose of the Study:

• To present a novel semi-classical model for calculating RABBITT traces.
• To incorporate complex two-dimensional spatial distributions of reference infrared fields.
• To analyze probe-induced phase in photo-emission experiments.

Main Methods:

• Solving classical equations of motion for electron spectra.
• Incorporating quantum phase acquired during electron-infrared field interaction.
• Coherent summation of contributions from individual attosecond pulses in a train.

Main Results:

• The model successfully calculates RABBITT traces with complex 2D infrared field distributions.
• Validation of the model in a simplified one-dimensional case.
• Demonstration of the model's capability for non-trivial 2D field distributions.

Conclusions:

• The developed semi-classical model offers flexibility for simulating attosecond experiments.
• The model provides insights into probe-induced phase effects in photo-emission.
• This approach enhances the analysis of ultrafast electron dynamics with complex laser fields.