Effect of Light-Induced Conical Intersection on the Photodissociation Dynamics of the D2+ Molecule

Abstract

It is known that conical intersections (CIs) can be induced by laser light even in diatomics. In the close vicinity of these laser-induced CIs (LICIs) the nonadiabatic effects are infinitely strong, as is the case for naturally appearing CIs in field-free polyatomics. In the present work we study the photodissociation dynamics of the D₂⁺ molecule in an intense laser field to investigate the role of the LICI. Specifically, the kinetic energy release (KER) and the angular distribution of the photodissociation products are calculated with and without LICI for different initial conditions and for different values of the laser parameters. To do so, both one- and two-dimensional calculations were performed. In the first model the molecules were rotationally frozen, whereas in the latter one, the molecular rotation is included as a full additional dynamic variable. The results obtained undoubtedly demonstrate the strong impact of the coupling of the rotation to the vibrational and electronic motions and hence of the LICI on the dissociation dynamics of the D₂⁺ molecule.