Modeling of the processes of ionization and excitation of nitrogen molecules by short and intense laser pulses

Vladimir T Tikhonchuk (1, 2) , Yi Liu (3, 4) , Rostyslav Danylo (5, 3) , Aurélien Houard (5) , André Mysyrowicz (5)

1 CELIA - Centre d'Etudes Lasers Intenses et Applications
2 ELI-Beamlines, Institute of Physics, Czech Academy of Sciences, 5 Kvetna 835, 25241 Dolni Brezany, Czech Republic
3 Shanghai Key Lab of Modern Optical System
4 CAS Center for Excellence in Ultra-Intense Laser Science
5 ILM - Interaction Laser-Matière

We present a model describing ionization and excitation of nitrogen molecules by a strong and short laser pulse. In difference to previous publications, both processes are considered within the same formalism of density matrix. We account for the dependence of the dipole moment on the vibrational quantum number and for a large number of excited levels. Populations of the excited levels depend significantly on the laser intensity, wavelength, polarization and pulse duration.

Domaines: Optique [physics.optics]

Vladimir T Tikhonchuk, Yi Liu, Rostyslav Danylo, Aurélien Houard, André Mysyrowicz. Modeling of the processes of ionization and excitation of nitrogen molecules by short and intense laser pulses. Physical Review A, 2021, 104 (6), pp.063116. ⟨10.1103/PhysRevA.104.063116⟩. ⟨hal-03510632⟩