The role of spin in the strong-field ionization of the triplet ground state of oxygen

We have demonstrated the spin-rotation coupling involvement in the strong-field ionization of cold oxygen molecules.  This experiment is performed with a low power 800 nm pump pulse which excites a few rotational Raman cycles making sure that the multiple Raman excitation does not overshadow the spin coupled excitations, this process is probed by a strong 800 nm short pulse with strong-field ionization of the molecule. This coupling leads to an interesting observation of non-periodic structure in the time-domain which is otherwise, a periodic revival structure for the same class of molecule. We have modeled the ground state dynamics using Hund’s basis (b), with an assumption that polarizability only affects the alignment of the molecule, the time-dependent Schrödinger equation has been solved and this allows us to used fit the dynamics using the Orientation Resolution through Rotational Coherence Spectroscopy (ORRCS) procedure.