A flexible beamline combining XUV attosecond pulses with few-femtosecond UV and near-infrared pulses for time-resolved experiments.

Autor:	Wanie V; Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany., Ryabchuk S; Department of Physics, Universität Hamburg, 22761 Hamburg, Germany.; The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany., Colaizzi L; Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany.; Department of Physics, Universität Hamburg, 22761 Hamburg, Germany., Galli M; Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany.; Institute for Photonics and Nanotechnologies CNR-IFN, 20133 Milano, Italy.; Department of Physics, Politecnico di Milano, 20133 Milano, Italy., Månsson EP; Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany., Trabattoni A; Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany.; Institute of Quantum Optics, Leibniz Universität Hannover, 30167 Hannover, Germany., Wahid AB; Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany., Hahne J; Department of Physics, Universität Hamburg, 22761 Hamburg, Germany.; The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany., Cartella A; Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany.; The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany., Saraswathula K; Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany.; Department of Physics, Universität Hamburg, 22761 Hamburg, Germany., Frassetto F; Institute for Photonics and Nanotechnologies CNR-IFN, 35131 Padova, Italy., Lopes DP; Department of Physics, Politecnico di Milano, 20133 Milano, Italy., Martínez Vázquez R; Institute for Photonics and Nanotechnologies CNR-IFN, 20133 Milano, Italy., Osellame R; Institute for Photonics and Nanotechnologies CNR-IFN, 20133 Milano, Italy., Poletto L; Institute for Photonics and Nanotechnologies CNR-IFN, 35131 Padova, Italy., Légaré F; Centre Énergie Matériaux Télécommunications, Institut National de la Recherche Scientifique, J3X 1S2 Varennes, Canada., Nisoli M; Institute for Photonics and Nanotechnologies CNR-IFN, 20133 Milano, Italy.; Department of Physics, Politecnico di Milano, 20133 Milano, Italy., Calegari F; Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany.; Department of Physics, Universität Hamburg, 22761 Hamburg, Germany.; The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany.
Jazyk:	angličtina
Zdroj:	The Review of scientific instruments [Rev Sci Instrum] 2024 Aug 01; Vol. 95 (8).
DOI:	10.1063/5.0190889
Abstrakt:	We describe a beamline where few-femtosecond ultraviolet (UV) pulses are generated and synchronized to few-cycle near-infrared (NIR) and extreme ultraviolet (XUV) attosecond pulses. The UV light is obtained via third-harmonic generation in argon or neon gas when focusing a phase-stabilized NIR driving field inside a glass cell that was designed to support high pressures for enhanced conversion efficiency. A recirculation system allows reducing the large gas consumption required for the nonlinear process. Isolated attosecond pulses are generated using the polarization gating technique, and the photon spectrometer employed to characterize the XUV radiation consists of a new design based on the combination of a spherical varied-line-space grating and a cylindrical mirror. This design allows for compactness while providing a long entrance arm for integrating different experimental chambers. The entire interferometer is built under vacuum to prevent both absorption of the XUV light and dispersion of the UV pulses, and it is actively stabilized to ensure an attosecond delay stability during experiments. This table-top source has been realized with the aim of investigating UV-induced electron dynamics in neutral states of bio-relevant molecules, but it also offers the possibility to implement a manifold of novel time-resolved experiments based on photo-ionization/excitation of gaseous and liquid targets by ultraviolet radiation. UV pump-XUV probe measurements in ethyl-iodide showcase the capabilities of the attosecond beamline. (© 2024 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).)
Databáze:	MEDLINE
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