A table-top few-femtosecond broadband extreme-ultraviolet absorption spectrometer with cryogenic cooling
Abstract
We present a table-top cryogenic ultrafast broadband XUV absorption spectroscopy (c-UBXAS) beamline designed for temperature-dependent and time-resolved investigations of quantum materials. The instrument combines a broadband high-harmonic generation source spanning 22-73 eV with automated image registration and cryogenic sample control down to 20 K, enabling element-specific measurements under both equilibrium and nonequilibrium conditions. The beamline provides sub-50-meV energy resolution and a sub-10-fs instrument response function, while maintaining long-term stability suitable for extended, ultrasensitive measurements. Benchmark experiments on NiI2, a van der Waals multiferroic, reveal temperature-dependent spectral evolution across its magnetic phase transitions, demonstrating the ability to identify element-specific contributions to the ground state and its transient response in the femtosecond regime. This instrument introduces the opportunity to unravel the very first response of a solid-state material during light-matter interaction, paving the way for understanding the complex phase space of nonequilibrium dynamics and emergent states in strongly correlated systems where the few-femtosecond electronic response has eluded most other types of time-resolved techniques.
Versions
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BibTeX
@misc{lin2026tabletop,
title = {{A table-top few-femtosecond broadband extreme-ultraviolet absorption spectrometer with cryogenic cooling}},
author = {Sheng-Chih Lin and Alfred Zong and Emma Berger and Bailey R. Nebgen and Marcus Hui and Shuaiwei Pan and Jackson McClellan and Michael W. Zuerch},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.03955},
eprint = {2608.03955},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.03955},
}
RIS
TY - UNPB
TI - A table-top few-femtosecond broadband extreme-ultraviolet absorption spectrometer with cryogenic cooling
AU - Sheng-Chih Lin
AU - Alfred Zong
AU - Emma Berger
AU - Bailey R. Nebgen
AU - Marcus Hui
AU - Shuaiwei Pan
AU - Jackson McClellan
AU - Michael W. Zuerch
PY - 2026
DA - 2026/08/04
PB - arXiv
DO - 10.48550/arxiv.2608.03955
UR - https://arxiv.org/abs/2608.03955
AB - We present a table-top cryogenic ultrafast broadband XUV absorption spectroscopy (c-UBXAS) beamline designed for temperature-dependent and time-resolved investigations of quantum materials. The instrument combines a broadband high-harmonic generation source spanning 22-73 eV with automated image registration and cryogenic sample control down to 20 K, enabling element-specific measurements under both equilibrium and nonequilibrium conditions. The beamline provides sub-50-meV energy resolution and a sub-10-fs instrument response function, while maintaining long-term stability suitable for extended, ultrasensitive measurements. Benchmark experiments on NiI_2, a van der Waals multiferroic, reveal temperature-dependent spectral evolution across its magnetic phase transitions, demonstrating the ability to identify element-specific contributions to the ground state and its transient response in the femtosecond regime. This instrument introduces the opportunity to unravel the very first response of a solid-state material during light-matter interaction, paving the way for understanding the complex phase space of nonequilibrium dynamics and emergent states in strongly correlated systems where the few-femtosecond electronic response has eluded most other types of time-resolved techniques.
ER -