Multiple ionization of argon via multi-XUV-photon absorption induced by 20-GW high-order harmonic laser pulses
Arjun NayakFoundation for Research and Technology–Hellas, Institute of Electronic Structure and Laser, P.O. Box 1527, GR71110 Crete, GreeceIoannis OrfanosDepartment of Physics, University of Crete, P.O. Box 2208, GR71003 Crete, GreeceIoannis MakosDepartment of Physics, University of Crete, P.O. Box 2208, GR71003 Crete, GreeceMathieu DumergueELI-ALPS, ELI-Hu Kft., Dugonics ter 13, H-6720 Szeged, HungaryS. KühnELI-ALPS, ELI-Hu Kft., Dugonics ter 13, H-6720 Szeged, HungaryE. SkantzakisFoundation for Research and Technology–Hellas, Institute of Electronic Structure and Laser, P.O. Box 1527, GR71110 Crete, GreeceBalázs BódiMTA “Lendület” Ultrafast Nanooptics Group, Wigner Research Center for Physics, 1121 Budapest, HungaryKatalin VarjúDepartment of Optics and Quantum Electronics, University of Szeged, Szeged, HungaryC. KalpouzosFoundation for Research and Technology–Hellas, Institute of Electronic Structure and Laser, P.O. Box 1527, GR71110 Crete, GreeceH. I. B. BanksDepartment of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, England, United KingdomAgapi EmmanouilidouDepartment of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, England, United KingdomD. CharalambidisDepartment of Physics, University of Crete, P.O. Box 2208, GR71003 Crete, GreeceP. TzallasFoundation for Research and Technology–Hellas, Institute of Electronic Structure and Laser, P.O. Box 1527, GR71110 Crete, Greece
2018en
ABI
Аннотация
We report the observation of multiple ionization of argon through multi-XUV-photon absorption induced by an unprecedentedly powerful laser driven high-order harmonic generation source. Comparing the measured intensity dependence of the yield of the different argon charge states with numerical calculations we can infer the different channels---direct and sequential---underlying the interaction. While such studies were feasible so far only with free electron laser (FEL) sources, this paper connects highly nonlinear XUV processes with the ultrashort time scales inherent to the harmonic pulses and highlights the advanced perspectives of emerging large scale laser research infrastructures.
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