XUV Transmission Spectroscopy Using a Tabletop High-Harmonic Source
Abstract
High-harmonic generation (HHG) provides a coherent ultrashort-pulse light source in the extreme- ultraviolet (XUV) region and has potential applications in time-resolved spectroscopy and materials characterization. In this study, we constructed an HHG system using a Yb:KGW laser system (PHAROS, Light Conversion) as the driving source and Ar gas as the nonlinear medium. High-order harmonics were observed up to a photon energy of 70.6 eV, corresponding to the 59th harmonic order. As an application of the developed XUV source, we measured the transmission of a Mg thin film and a Si3N4 membrane. In addition, the surface chemical state of the Mg thin film was characterized by X-ray photoelectron spectroscopy (XPS), and the results were compared with the transmission measured using the HHG source. This comparison was used to examine the relationship between the surface condition, including surface oxidation, and the XUV transmission of the Mg thin film. These results demonstrate the applicability of the developed Ar-based HHG source to the characterization of thin-film transmission in the XUV spectral region.
Related
- Retrieval of the dephasing time in solids from spatial high-harmonic spectroscopy
- Theoretical description of high-harmonic spectroscopy for uniaxial nematic and isotropic liquid crystals
- Sub-cycle doublon-holon dynamics in one-dimensional Mott insulators revealed by two-color high-harmonic spectroscopy
- Tracking multiscale liquid crystal order with high harmonic spectroscopy
- Transient High-Harmonic Generation from Solids: From Spectroscopy and Control to Programmable Emission
BibTeX
@misc{takahashi2026transmission,
title = {{XUV Transmission Spectroscopy Using a Tabletop High-Harmonic Source}},
author = {Ryunosuke Takahashi and Soudai Sakoda and Kaede Yamada and Jumpei Horai and Shigetoshi Tomita and Yuto Shiokawa and Nobuhisa Ishii and Hiroki Wadati},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.00511},
eprint = {2609.00511},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.00511},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - XUV Transmission Spectroscopy Using a Tabletop High-Harmonic Source
AU - Ryunosuke Takahashi
AU - Soudai Sakoda
AU - Kaede Yamada
AU - Jumpei Horai
AU - Shigetoshi Tomita
AU - Yuto Shiokawa
AU - Nobuhisa Ishii
AU - Hiroki Wadati
PY - 2026
DA - 2026/09/01
PB - arXiv
DO - 10.48550/arxiv.2609.00511
UR - https://arxiv.org/abs/2609.00511
AB - High-harmonic generation (HHG) provides a coherent ultrashort-pulse light source in the extreme- ultraviolet (XUV) region and has potential applications in time-resolved spectroscopy and materials characterization. In this study, we constructed an HHG system using a Yb:KGW laser system (PHAROS, Light Conversion) as the driving source and Ar gas as the nonlinear medium. High-order harmonics were observed up to a photon energy of 70.6 eV, corresponding to the 59th harmonic order. As an application of the developed XUV source, we measured the transmission of a Mg thin film and a Si3N4 membrane. In addition, the surface chemical state of the Mg thin film was characterized by X-ray photoelectron spectroscopy (XPS), and the results were compared with the transmission measured using the HHG source. This comparison was used to examine the relationship between the surface condition, including surface oxidation, and the XUV transmission of the Mg thin film. These results demonstrate the applicability of the developed Ar-based HHG source to the characterization of thin-film transmission in the XUV spectral region.
ER -