Multiphoton and tunneling ionization probability of atoms and molecules in an intense laser field

摘要: Abstract We theoretically studied ionization of atoms exposed to an intense laser field by using three different methods, i.e., the numerical solution single-active-electron approximation based time-dependent Schrodinger equation (SAE-TDSE), Perelomov–Popov–Terent'ev (PPT) model, and Ammosov–Delone–Krainov (ADK) model. The several linear molecules in a strong is also investigated with molecular ADK (MO-ADK) PPT (MO-PPT) show that probability from MO-PPT model agrees well corresponding SAE-TDSE result both multiphoton tunneling regimes. By considering volume effect field, signal obtained fits experimental data whole range However, MO-ADK models seriously underestimate probabilities (or signals) regime.