Time- and Polarization-Resolved Extreme Ultraviolet Momentum Microscopy
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866914063687090176 |
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| author | Fragkos, Sotirios Courtade, Quentin Tkach, Olena Gaudin, Jérôme Descamps, Dominique Barrette, Guillaume Petit, Stéphane Schönhense, Gerd Mairesse, Yann Beaulieu, Samuel |
| author_facet | Fragkos, Sotirios Courtade, Quentin Tkach, Olena Gaudin, Jérôme Descamps, Dominique Barrette, Guillaume Petit, Stéphane Schönhense, Gerd Mairesse, Yann Beaulieu, Samuel |
| contents | We report the development of an instrument combining an ultrafast, high-repetition-rate, polarization-tunable monochromatic extreme ultraviolet (XUV, 21.6 eV) beamline and a next-generation momentum microscope endstation. This setup enables time- and angle-resolved photoemission spectroscopy of quantum materials, offering multimodal photoemission dichroism capabilities. The momentum microscope simultaneously detects the full surface Brillouin zone over an extended binding energy range. It is equipped with advanced electron optics, including a new type of front lens that supports multiple operational modes. Enhanced spatial resolution is achieved by combining the small XUV beam footprint (33 $μ$m by 45 $μ$m) with the selection of small regions of interest using apertures positioned in the Gaussian plane of the momentum microscope. This instrument achieves an energy resolution of 44 meV and a temporal resolution of 144 fs. We demonstrate the capability to perform linear, Fourier, and circular dichroism in photoelectron angular distributions from photoexcited 2D materials. This functionality paves the way for time-, energy-, and momentum-resolved investigations of orbital and quantum geometrical properties underlying electronic structures of quantum materials driven out of equilibrium. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_02371 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Time- and Polarization-Resolved Extreme Ultraviolet Momentum Microscopy Fragkos, Sotirios Courtade, Quentin Tkach, Olena Gaudin, Jérôme Descamps, Dominique Barrette, Guillaume Petit, Stéphane Schönhense, Gerd Mairesse, Yann Beaulieu, Samuel Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons We report the development of an instrument combining an ultrafast, high-repetition-rate, polarization-tunable monochromatic extreme ultraviolet (XUV, 21.6 eV) beamline and a next-generation momentum microscope endstation. This setup enables time- and angle-resolved photoemission spectroscopy of quantum materials, offering multimodal photoemission dichroism capabilities. The momentum microscope simultaneously detects the full surface Brillouin zone over an extended binding energy range. It is equipped with advanced electron optics, including a new type of front lens that supports multiple operational modes. Enhanced spatial resolution is achieved by combining the small XUV beam footprint (33 $μ$m by 45 $μ$m) with the selection of small regions of interest using apertures positioned in the Gaussian plane of the momentum microscope. This instrument achieves an energy resolution of 44 meV and a temporal resolution of 144 fs. We demonstrate the capability to perform linear, Fourier, and circular dichroism in photoelectron angular distributions from photoexcited 2D materials. This functionality paves the way for time-, energy-, and momentum-resolved investigations of orbital and quantum geometrical properties underlying electronic structures of quantum materials driven out of equilibrium. |
| title | Time- and Polarization-Resolved Extreme Ultraviolet Momentum Microscopy |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2507.02371 |