Isolated high-harmonic XUV photon absorption and NIR strong-field tunnel ionization (Articolo in rivista)

Type
Label
  • Isolated high-harmonic XUV photon absorption and NIR strong-field tunnel ionization (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/1367-2630/14/1/013057 (literal)
Alternative label
  • W.A. Bryan, F. Frassetto, C.A. Froud, I.C.E. Turcu, R.B. King, C.R. Calvert, G.R.A.J. Nemeth, P. Villoresi, L. Poletto and E. Springate (2012)
    Isolated high-harmonic XUV photon absorption and NIR strong-field tunnel ionization
    in New journal of physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • W.A. Bryan, F. Frassetto, C.A. Froud, I.C.E. Turcu, R.B. King, C.R. Calvert, G.R.A.J. Nemeth, P. Villoresi, L. Poletto and E. Springate (literal)
Pagina inizio
  • 013057 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 14 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] Swansea Univ, Coll Sci, Dept Phys, Swansea SA2 8PP, W Glam, Wales [ 2 ] STFC Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England [ 3 ] Natl Res Council Italy, Inst Photon & Nanotechnol, Padua, Italy [ 4 ] Queens Univ Belfast, Sch Math & Phys, Ctr Plasma Phys, Belfast BT7 1NN, Antrim, North Ireland (literal)
Titolo
  • Isolated high-harmonic XUV photon absorption and NIR strong-field tunnel ionization (literal)
Abstract
  • Extreme ultraviolet (XUV) pulses with a duration of tens of femtoseconds initiate 4s(-1) or 4p(-1) photoionization of krypton, which populates highly excited satellite states through the electron correlation. The excited ions are then tunnel ionized to Kr2+ 4s(-1)4p(-1) or 4p(-2) by a strong-field near-infrared (NIR) pulse of a similar duration. The XUV pulses are produced by high harmonic generation in a gas jet and we employ a state-of-the-art time-preserving monochromator to isolate individual XUV harmonic orders. An enhancement of the Kr2+ yield as a function of harmonic photon energy and XUV-pump NIR-probe delay is observed and compared with a two-step model, which allows the population of the satellite states to be inferred. Furthermore, relative 4s and 4p satellite excitation cross-sections are predicted at the photon energies studied. This proof-of-principle experiment demonstrates that isolated harmonics can be employed to pump specific electronic states, which will be highly complementary to synchrotron, attosecond and x-ray free-electron laser studies of complex systems. (literal)
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