Coherent Control of Internal Conversion in Strong-Field Molecular Ionization

Phys Rev Lett. 2020 Jul 31;125(5):053202. doi: 10.1103/PhysRevLett.125.053202.


We demonstrate coherent control over internal conversion during strong-field molecular ionization with shaped, few-cycle laser pulses. The control is driven by interference in different neutral states, which are coupled via non-Born-Oppenheimer terms in the molecular Hamiltonian. Our measurements highlight the preservation of electronic coherence in nonadiabatic transitions between electronic states.