Insights into the laser-assisted photoelectric effect from solid-state surfaces

Wenthaus, Lukas [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000178169007); Kabachnik, Nikolay M. [European XFEL, Schenefeld (Germany); Donostia International Physics Center (DIPC), San Sebastian (Spain)] (ORCID:0000000344587643); Borgwardt, Mario [Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000216937047); Palutke, Steffen [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000186932674); Kutnyakhov, Dmytro [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000262944600); Pressacco, Federico [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000282994269); Scholz, Markus [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000156699912); Potorochin, Dmitrii [Technische Universität Bergakademie Freiberg (Germany)] (ORCID:0000000342395293); Wind, Nils [Univ. of Hamburg (Germany)] (ORCID:0000000277580678); Düsterer, Stefan [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000343791327); Brenner, Günter [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)]; Gessner, Oliver [Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000347092822); Molodtsov, Serguei [European XFEL, Schenefeld (Germany); Technische Universität Bergakademie Freiberg (Germany)]; Eberhardt, Wolfgang [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000207140300); Roth, Friedrich [Technische Universität Bergakademie Freiberg (Germany)] (ORCID:0000000190439807)

doi:10.1103/physrevb.110.235406

DOE OSTI · 2496676

Insights into the laser-assisted photoelectric effect from solid-state surfaces

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Abstract

Photoemission from a solid surface provides a wealth of information about its electronic structure and dynamic evolution. Ultrafast pump-probe experiments offer real-time access to photon-surface interactions and the resulting electron dynamics. Here, we present a femtosecond time-resolved photoelectron spectroscopy study of laser-assisted photoemission (LAPE) from two different metal surfaces, tungsten and platinum. Utilizing synchronized IR laser and x-ray pulses, photoelectron sideband generation up to the sixth order is observed. A significant material-dependent variation of the LAPE response has not been predicted by previous theoretical models, to the best of our knowledge. The observed phenomena are semiquantitatively reproduced by considering distinct dynamic dielectric responses of the two materials. In conclusion, these findings provide a deeper understanding of the LAPE process and insights into the dynamic interplay between optical laser fields and metal surfaces.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY Dielectric properties Electron emission Photoemission spectroscopy Photoinduced effect Surface & interfacial phenomena Transition metals Ultrafast pump-probe spectroscopy

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Wenthaus, Lukas [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000178169007), Kabachnik, Nikolay M. [European XFEL, Schenefeld (Germany); Donostia International Physics Center (DIPC), San Sebastian (Spain)] (ORCID:0000000344587643), Borgwardt, Mario [Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000216937047), Palutke, Steffen [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000186932674), Kutnyakhov, Dmytro [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000262944600), Pressacco, Federico [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000282994269), Scholz, Markus [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000156699912), Potorochin, Dmitrii [Technische Universität Bergakademie Freiberg (Germany)] (ORCID:0000000342395293), Wind, Nils [Univ. of Hamburg (Germany)] (ORCID:0000000277580678), Düsterer, Stefan [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000343791327), Brenner, Günter [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)], Gessner, Oliver [Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000347092822), Molodtsov, Serguei [European XFEL, Schenefeld (Germany); Technische Universität Bergakademie Freiberg (Germany)], Eberhardt, Wolfgang [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)] (ORCID:0000000207140300), Roth, Friedrich [Technische Universität Bergakademie Freiberg (Germany)] (ORCID:0000000190439807). 2024-12-05. Insights into the laser-assisted photoelectric effect from solid-state surfaces. https://doi.org/10.1103/physrevb.110.235406

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