Light-induced photodissociation in the lowest three electronic states of the NaH molecule.

It has been known that electronic conical intersections in a molecular system can also be created by laser light even in diatomics. The direct consequence of these light-induced degeneracies is the appearance of a strong mixing between the electronic and vibrational motions, which has a strong fingerprint on the ultrafast nuclear dynamics. In the present work, pump and probe numerical simulations are performed with the NaH molecule involving the first three singlet electronic states (XΣ(X), AΣ(A) and BΠ(B)) and several light-induced degeneracies in the numerical description.