Table-Top Nonlinear Optics in the 100-eV Spectral Region.
Posted on 2018-02-22 - 14:56
Nonlinear light-matter interactions in the extreme ultraviolet (XUV) are a prerequisite to perform XUV-pump/XUV-probe spectroscopy of core electrons. Such interactions are now routinely investigated at free-electron laser (FEL) facilities. Yet, electron dynamics are often too fast to be captured with the femtosecond resolution of state-of-the-art FELs. Attosecond pulses from laser-driven XUV-sources offer the necessary temporal resolution. However, intense attosecond pulses supporting nonlinear processes have only been available for photon energy below 50 eV, precluding XUV-pump/XUV-probe investigation of typical inner-shell processes. Here, we surpass this limitation by demonstrating two-photon absorption from inner electronic shells of xenon at photon energies around 93 eV and 115 eV. This advance opens the door for attosecond real-time observation of nonlinear electron dynamics deep inside atoms.
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Bergues, Boris; Rivas, Daniel; Weidman, Matthew; muschet, alexander; Helml, Wolfram; Guggenmos, Alexander; et al. (2018). Table-Top Nonlinear Optics in the 100-eV Spectral Region.. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.3922258.v1
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AUTHORS (10)
BB
Boris Bergues
DR
Daniel Rivas
MW
Matthew Weidman
am
alexander muschet
WH
Wolfram Helml
AG
Alexander Guggenmos
VP
Vladimir Pervak
UK
Ulf Kleineberg
GM
Gilad Marcus
RK
Reinhard Kienberger