Nonadiabatic Multielectron Dynamics in Strong Field Molecular Ionization.

Area of Science:

• Physical Chemistry
• Molecular Physics
• Quantum Dynamics

Background:

• Strong field ionization is a fundamental process in molecular physics.
• Understanding multielectron dynamics is crucial for predicting molecular response to intense laser fields.
• Nonadiabatic effects play a significant role in complex molecular systems.

Purpose of the Study:

• To identify and characterize a general strong field ionization mechanism in polyatomic molecules.
• To investigate the influence of nonadiabatic multielectron excitation dynamics on molecular ionization, fragmentation, and energetics.
• To determine the dependence of this ionization mechanism on optical frequency, intensity, and molecular properties.

Main Methods:

• Theoretical modeling of multielectron dynamics in polyatomic molecules.
• Numerical simulations of molecular response to intense laser fields.
• Analysis of ionization yields, fragmentation patterns, and energy distributions.

Main Results:

• Observation of a novel strong field ionization mechanism driven by nonadiabatic multielectron excitation.
• Demonstration that this mechanism significantly alters molecular ionization pathways and fragmentation.
• Quantification of the impact on molecular energetics under varying optical conditions.

Conclusions:

• Nonadiabatic multielectron excitation is a key factor in strong field ionization of polyatomic molecules.
• This mechanism provides a unified explanation for observed phenomena in molecular strong field interactions.
• The findings offer a new framework for controlling and understanding molecular ionization and fragmentation.