Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution
Abstract Time-resolved momentum microscopy is an emerging technique based on photoelectron spectroscopy for characterizing ultrafast electron dynamics and the out-of-equilibrium electronic structure of materials in the entire Brillouin zone with high efficiency. In this article, we introduce a setup...
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| Format: | Article |
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-86660-1 |
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| author | Karl Jakob Schiller Lasse Sternemann Matija Stupar Alan Omar Martin Hoffmann Jonah Elias Nitschke Valentin Mischke David Maximilian Janas Stefano Ponzoni Giovanni Zamborlini Clara Jody Saraceno Mirko Cinchetti |
| author_facet | Karl Jakob Schiller Lasse Sternemann Matija Stupar Alan Omar Martin Hoffmann Jonah Elias Nitschke Valentin Mischke David Maximilian Janas Stefano Ponzoni Giovanni Zamborlini Clara Jody Saraceno Mirko Cinchetti |
| author_sort | Karl Jakob Schiller |
| collection | DOAJ |
| description | Abstract Time-resolved momentum microscopy is an emerging technique based on photoelectron spectroscopy for characterizing ultrafast electron dynamics and the out-of-equilibrium electronic structure of materials in the entire Brillouin zone with high efficiency. In this article, we introduce a setup for time-resolved momentum microscopy based on an energy-filtered momentum microscope coupled to a custom-made high-harmonic generation photon source driven by a multi-100 kHz commercial Yb-ultrafast laser that delivers fs pulses in the extreme ultraviolet range. The laser setup includes a nonlinear pulse compression stage employing spectral broadening in a Herriott-type bulk-based multi-pass cell. This element allows flexible tuning of the driving pulse duration, providing a versatile time-resolved momentum microscopy setup featuring two operational modes designed to enhance either the energy or time resolution. We show the capabilities of the system by tracing ultrafast electron dynamics in the conduction band valleys of a bulk crystal of the 2D semiconductor WS2. Using uncompressed driving laser pulses, we demonstrate an energy resolution better than (107 ± 2) meV, while compressed pulses lead to a time resolution better than (48.8 ± 17) fs. |
| format | Article |
| id | doaj-art-cd4cd545ef7646e391c7d888a3cc2b5e |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-cd4cd545ef7646e391c7d888a3cc2b5e2025-02-02T12:18:59ZengNature PortfolioScientific Reports2045-23222025-01-0115111110.1038/s41598-025-86660-1Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolutionKarl Jakob Schiller0Lasse Sternemann1Matija Stupar2Alan Omar3Martin Hoffmann4Jonah Elias Nitschke5Valentin Mischke6David Maximilian Janas7Stefano Ponzoni8Giovanni Zamborlini9Clara Jody Saraceno10Mirko Cinchetti11Department of Physics, TU Dortmund UniversityDepartment of Physics, TU Dortmund UniversityDepartment of Physics, TU Dortmund UniversityPhotonics and Ultrafast Laser Science, Ruhr University BochumPhotonics and Ultrafast Laser Science, Ruhr University BochumDepartment of Physics, TU Dortmund UniversityDepartment of Physics, TU Dortmund UniversityDepartment of Physics, TU Dortmund UniversityDepartment of Physics, TU Dortmund UniversityDepartment of Physics, TU Dortmund UniversityPhotonics and Ultrafast Laser Science, Ruhr University BochumDepartment of Physics, TU Dortmund UniversityAbstract Time-resolved momentum microscopy is an emerging technique based on photoelectron spectroscopy for characterizing ultrafast electron dynamics and the out-of-equilibrium electronic structure of materials in the entire Brillouin zone with high efficiency. In this article, we introduce a setup for time-resolved momentum microscopy based on an energy-filtered momentum microscope coupled to a custom-made high-harmonic generation photon source driven by a multi-100 kHz commercial Yb-ultrafast laser that delivers fs pulses in the extreme ultraviolet range. The laser setup includes a nonlinear pulse compression stage employing spectral broadening in a Herriott-type bulk-based multi-pass cell. This element allows flexible tuning of the driving pulse duration, providing a versatile time-resolved momentum microscopy setup featuring two operational modes designed to enhance either the energy or time resolution. We show the capabilities of the system by tracing ultrafast electron dynamics in the conduction band valleys of a bulk crystal of the 2D semiconductor WS2. Using uncompressed driving laser pulses, we demonstrate an energy resolution better than (107 ± 2) meV, while compressed pulses lead to a time resolution better than (48.8 ± 17) fs.https://doi.org/10.1038/s41598-025-86660-1 |
| spellingShingle | Karl Jakob Schiller Lasse Sternemann Matija Stupar Alan Omar Martin Hoffmann Jonah Elias Nitschke Valentin Mischke David Maximilian Janas Stefano Ponzoni Giovanni Zamborlini Clara Jody Saraceno Mirko Cinchetti Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution Scientific Reports |
| title | Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution |
| title_full | Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution |
| title_fullStr | Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution |
| title_full_unstemmed | Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution |
| title_short | Time-resolved momentum microscopy with fs-XUV photons at high repetition rates with flexible energy and time resolution |
| title_sort | time resolved momentum microscopy with fs xuv photons at high repetition rates with flexible energy and time resolution |
| url | https://doi.org/10.1038/s41598-025-86660-1 |
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