Journal
SCIENCE ADVANCES
Volume 7, Issue 21, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abe2265
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Funding
- European Community's Horizon 2020 research and innovation program [654148]
- Max Planck Society (Max Planck Research Group)
- Federal Ministry of Education and Research (BMBF) under Make our Planet Great Again -German Research Initiative [57427209]
- Investissements d'Avenir Labex PALM [ANR-10-LABX-0039-PALM]
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Education [2019R1A6A3A03032979]
- U.S. Air Force Office of Scientific Research [FA9550-19-1-0314, FA9550-20-1-0334]
- W. M. Keck Foundation [046300-002, 993922]
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
- NSF [ACI-1548562]
- Deutsche Forschungsgemeinschaft (DFG
- German Research Foundation) under Germany's Excellence Strategy [EXC 2051, 390713860]
- UC Office of the President within the Multicampus Research Programs and Initiatives [M21PL3263]
- Laboratory Directed Research and Development Program at Berkeley Lab [107573]
- National Research Foundation of Korea [2019R1A6A3A03032979] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The lack of high flux and coherence in available table-top XUV sources has limited the use of nonlinear XUV and x-ray spectroscopies to free-electron lasers (FELs). This study demonstrates second harmonic generation (SHG) on a table-top XUV source, opening up new opportunities for studying element-specific dynamics.
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 TiM2,3 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.
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