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Nonadiabatic Electron Dynamics in Orthogonal Two-Color Laser Fields with Comparable Intensities
Ji-Wei Geng1, Wei-Hao Xiong1, Xiang-Ru Xiao1
1State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China.
Physical Review Letters
|November 21, 2015
Summary
Investigating electron dynamics in two-color laser fields reveals nonadiabatic effects and Coulomb potential significantly influence electron trajectories. These factors are crucial for understanding subcycle electron behavior under intense laser interactions.
Area of Science:
- Quantum mechanics
- Atomic, molecular, and optical physics
- Strong field physics
Background:
- Ultrafast electron dynamics are fundamental to understanding light-matter interactions.
- Two-color laser fields offer complex control over electron behavior.
Purpose of the Study:
- To theoretically investigate nonadiabatic subcycle electron dynamics.
- To analyze the roles of nonadiabatic effects and Coulomb potential in electron motion.
Main Methods:
- Exact solution of the 3D time-dependent Schrödinger equation.
- Quantum trajectory Monte Carlo simulation.
- Coulomb-corrected strong field approximation.
Main Results:
- Identified mechanisms governing subcycle electron dynamics.
- Confirmed significant contributions from nonadiabatic effects and Coulomb potential.
- Observed phase-dependent impact of Coulomb potential on electron trajectories.
Conclusions:
- Nonadiabatic ionization rate and initial velocities are key nonadiabatic effects.
- Coulomb potential's influence varies with relative pulse phase.
- Accurate simulation requires considering both nonadiabaticity and Coulomb interaction.
