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Bright continuously tunable vacuum ultraviolet source for ultrafast spectroscopy

  • Ultrafast electron dynamics drive phenomena such as photochemical reactions, catalysis, and light harvesting. To capture such dynamics in real-time, femtosecond to attosecond light sources are extensively used. However, an exact match between the excitation photon energy and a characteristic resonance is crucial. High-harmonic generation sources are advantageous in terms of pulse duration but limited in spectral tunability in the vacuum ultraviolet range. Here, we present a monochromatic femtosecond source continuously tunable around 21eV photon energy utilizing the second harmonic of an optical parametric chirped pulse amplification laser system to drive high-harmonic generation. The unique tunability of the source is verified in an experiment probing the interatomic Coulombic decay in doped He nanodroplets across the He absorption bands. Moreover, we achieved intensities sufficient for driving collective processes in multiply excited helium nanodroplets, which have been previously observed only at free electron lasers.

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Author:Lucie JurkovičováORCiD, Ltaief Ben LtaiefORCiD, Andreas Hult RoosORCiD, Ondřej HortORCiD, Ondřej FinkeORCiD, Martin AlbrechtORCiD, Ziaul HoqueORCiD, Eva KlimešováORCiD, Akgash Sundaralingam, Roman AntipenkovORCiD, Annika Grenfell, Alexandr ŠpačekORCiD, Wojciech Szuba, Maria KrikunovaORCiD, Marcel MudrichORCiD, Jaroslav NejdlORCiD, Jakob AndreassonORCiD
URN:urn:nbn:de:kobv:526-opus4-18462
DOI (Version of Record):https://doi.org/10.1038/s42005-023-01513-5
ISSN:2399-3650
Parent Title (English):Communications Physics
Publisher:Nature Publishing Group
Document Type:Article
Language:English
Year of Publication:2024
Publishing Institution:Technische Hochschule Wildau
Release Date:2024/01/17
Volume:7
Article Number:26
Source:Jurkovičová, L., Ben Ltaief, L., Hult Roos, A. et al. Bright continuously tunable vacuum ultraviolet source for ultrafast spectroscopy. Commun Phys 7, 26 (2024). https://doi.org/10.1038/s42005-023-01513-5
Faculties an central facilities:Fachbereich Ingenieur- und Naturwissenschaften
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften / 621 Angewandte Physik
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International
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