A simple method to find temporal overlap between THz and X-ray pulses using X-ray-induced carrier dynamics in semiconductors
Materials Science
2025-10-28 v2
Abstract
X-ray-induced carrier dynamics in silicon and gallium arsenide were investigated through intensity variations of transmitted terahertz (THz) pulses in the pico to microsecond time scale with X-ray free-electron laser and synchrotron radiation. We observed a steep reduction in THz transmission with a picosecond scale due to the X-ray-induced carrier generation, followed by a recovery on a nano to microsecond scale caused by the recombination of carriers. The rapid response in the former process is applicable to a direct determination of temporal overlap between THz and X-ray pulses for THz pump-X-ray probe experiments with an accuracy of a few picoseconds.
Keywords
Cite
@article{arxiv.2410.03206,
title = {A simple method to find temporal overlap between THz and X-ray pulses using X-ray-induced carrier dynamics in semiconductors},
author = {Yuya Kubota and Takeshi Suzuki and Shigeki Owada and Kenji Tamasaku and Hitoshi Osawa and Tadashi Togashi and Kozo Okazaki and Makina Yabashi},
journal= {arXiv preprint arXiv:2410.03206},
year = {2025}
}