Bound-Electron Nonlinearity beyond the Ionization Threshold

J. K. Wahlstrand, S. Zahedpour, A. Bahl, Miroslav Kolesik, H. M. Milchberg

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We present absolute space- and time-resolved measurements of the ultrafast laser-driven nonlinear polarizability in argon, krypton, xenon, nitrogen, and oxygen up to ionization fractions of a few percent. These measurements enable determination of the strongly nonperturbative bound-electron nonlinear polarizability well beyond the ionization threshold, where it is found to remain approximately quadratic in the laser field, a result normally expected at much lower intensities where perturbation theory applies.

Original languageEnglish (US)
Article number183901
JournalPhysical Review Letters
Volume120
Issue number18
DOIs
StatePublished - May 2 2018

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nonlinearity
ionization
thresholds
krypton
xenon
lasers
electrons
perturbation theory
time measurement
argon
nitrogen
oxygen

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Wahlstrand, J. K., Zahedpour, S., Bahl, A., Kolesik, M., & Milchberg, H. M. (2018). Bound-Electron Nonlinearity beyond the Ionization Threshold. Physical Review Letters, 120(18), [183901]. https://doi.org/10.1103/PhysRevLett.120.183901

Bound-Electron Nonlinearity beyond the Ionization Threshold. / Wahlstrand, J. K.; Zahedpour, S.; Bahl, A.; Kolesik, Miroslav; Milchberg, H. M.

In: Physical Review Letters, Vol. 120, No. 18, 183901, 02.05.2018.

Research output: Contribution to journalArticle

Wahlstrand, J. K. ; Zahedpour, S. ; Bahl, A. ; Kolesik, Miroslav ; Milchberg, H. M. / Bound-Electron Nonlinearity beyond the Ionization Threshold. In: Physical Review Letters. 2018 ; Vol. 120, No. 18.
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