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Journal Articles Science Advances Year : 2021

Table-top extreme ultraviolet second harmonic generation

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Abstract

The lack of available table-top extreme ultraviolet (XUV) sources with high enough fluxes and coherence properties has limited the availability of nonlinear XUV and x-ray spectroscopies to free-electron lasers (FELs). Here, we demonstrate second harmonic generation (SHG) on a table-top XUV source by observing SHG near the Ti M 2,3 edge with a high-harmonic seeded soft x-ray laser. Furthermore, this experiment represents the first SHG experiment in the XUV. First-principles electronic structure calculations suggest the surface specificity and separate the observed signal into its resonant and nonresonant contributions. The realization of XUV-SHG on a table-top source opens up more accessible opportunities for the study of element-specific dynamics in multicomponent systems where surface, interfacial, and bulk-phase asymmetries play a driving role.

Dates and versions

hal-03267513 , version 1 (22-06-2021)

Identifiers

Cite

Tobias Helk, Emma Berger, Sasawat Jamnuch, Lars Hoffmann, Adeline Kabacinski, et al.. Table-top extreme ultraviolet second harmonic generation. Science Advances , 2021, 7 (21), pp.eabe2265. ⟨10.1126/sciadv.abe2265⟩. ⟨hal-03267513⟩
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