Two-photon above-threshold ionization using extreme-ultraviolet harmonic emission from relativistic laser-plasma interaction

P. Heissler, P. Tzallas, J. M. Mikhailova, K. Khrennikov, L. Waldecker, F. Krausz, S. Karsch, D. Charalambidis, G. D. Tsakiris

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Abstract

We report on the observation of energy-resolved photoelectron (PE) spectra produced via two-extreme-ultraviolet-(XUV)-photon above-threshold ionization (ATI) of argon atoms. The XUV radiation consists of higherorder harmonics generated by the process of the relativistic oscillating mirror (ROM) in high-peak-power laser-pulse interaction with solid targets. The energetic XUV radiation is focused into an argon gas target at intensities high enough to induce two-photon ionization at yields that allow the recording of energy-resolved PE spectra. A clear two-XUV-photon ATI PE peak structure is observed in shot-to-shot measurements. This work is a first step towards a frequency-resolved optical gating-type characterization of attosecond pulse trains emanating from relativistic laser-plasma interactions and thus is important for XUV-pump-XUV-probe applications of these harmonics.

Original languageEnglish (US)
Article number043025
JournalNew Journal of Physics
Volume14
DOIs
StatePublished - Apr 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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