Coupling of autoionizing states by a chirped laser pulse

M Žitnik (1) , A Mihelič (1) , K Bučar (1) , M Hrast (1) , Ž Barba (1) , Š Krušič (1) , P Rebernik Ribič (2) , J Urbančič (3) , B Ressel (3) , M Stupar (3) , L Poletto (4) , M Coreno (5) , D Gauthier (6, 7) , G De Ninno (2, 3)

1 JSI - J. Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
2 Elettra Sincrotrone Trieste
3 Laboratory of Quantum Optics
4 IFN - CNR Institute for Photonics and Nanotechnologies
5 CNR-ISM - Istituto di Struttura della Materia
6 LIDYL - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
7 ATTO - Attophysique

Synopsis We have observed the autoionization of the laser-coupled 2s2 p 1 P o and 2 p 2 1 S e resonances in helium. The ions were collected while varying the frequency and delay of the extreme-ultraviolet (EUV) excitation pulse with respect to the linearly chirped visible (VIS) laser pulse. From the measured frequency-delay map the Autler-Townes splitting, the EUV-VIS cross-correlation and the linear chirp parameter were extracted.

Domaines: Physique [physics]

M Žitnik, A Mihelič, K Bučar, M Hrast, Ž Barba, et al.. Coupling of autoionizing states by a chirped laser pulse. Journal of Physics: Conference Series, 2020, 1412 (8), pp.082008. ⟨10.1088/1742-6596/1412/8/082008⟩. ⟨cea-04444575⟩