Intrinsic channel closing in strong-field single ionization ofH2

Abstract

The ionization of H 2 in intense laser pulses is studied by numerical integration of the time-dependent Schrödinger equation for a single-active-electron model including the vibrational motion. The electron kinetic-energy spectra in high-order above-threshold ionization are strongly dependent on the vibrational quantum number of the created H 2 + ion. For certain vibrational states, the electron yield in the mid-plateau region is strongly enhanced. The effect is attributed to channel closings, which were previously observed in atoms by varying the laser intensity.

Strong-Field Modulated Diffraction Effects in the Correlated Electron-Nuclear Motion in DissociatingH2+

“…The most elementary molecule H þ 2 and its isotopes are accessible to experimental studies and ab initio calculations [11][12][13][14][15][16][17][18]. Its dissociation therefore constitutes an ideal prototype reaction for understanding bound electronic motion during the breakup of chemical bonds in more complex chemical reactions.…”

Strong-field modulated diffraction effects in the correlated electron-nuclear motion in dissociating H2+

“…Investigation of the electron dynamics in a molecule or a chemical reaction requires the study of the correlated electronic and nuclear motion during the interaction with an ultrashort intense laser pulse. The most elementary molecule H þ 2 and its isotopes are accessible to experimental studies and ab initio calculations [11][12][13][14][15][16][17][18]. Its dissociation therefore constitutes an ideal prototype reaction for understanding bound electronic motion during the breakup of chemical bonds in more complex chemical reactions.…”

Sub-cycle directional control of the dissociative ionization of H2in tailored femtosecond laser fields

“…The influence of the CEP on the ultrafast dynamics has been widely studied for molecular hydrogen (H 2 , D 2 ) and for the molecular ions [29,35,[55][56][57][58][59][60][61][62][63][64][65]. After ionization, only one electron and two nuclei are left in the molecular ion and the system is accessible by ab initio calculations with high accuracy [55,[66][67][68][69][70]]. As a typical example for such simulations on the hydrogen molecular ion, we review a quantum simulation on + D , 2 conducted by solving the time-dependent Schrödinger equation (TDSE) [32].…”