Redirection and Reshaping of Intense Extreme-Ultraviolet Radiation
Abstract
The goal to control short-wavelength radiation for the investigation and manipulation of ultrafast dynamics in quantum systems coevolves with the growing availability of extreme-ultraviolet (XUV) and x-ray sources from high-harmonic generation and free-electron lasers. Here, we present an XUV spatio-spectral phase modulator based on an intense XUV laser beam propagating through an optically thick resonant target, introducing dispersion profile variations around the resonance both perpendicular to and along the laser propagation direction. The resulting dipole radiation gets spectrally reshaped and becomes more divergent as compared to the original beam in the far field. As an experimental demonstration, the intense-XUV-induced double-peak off-axis structure in the far-field spectrum obtained at the Free-Electron Laser in Hamburg (FLASH) shows indications of the underlying XUV-driven Rabi dynamics and resonant pulse propagation effects. The presented work highlights a ubiquitous phenomenon occurring when an intense laser beam passes through a resonant medium.
Keywords
Cite
@article{arxiv.2503.16344,
title = {Redirection and Reshaping of Intense Extreme-Ultraviolet Radiation},
author = {Yu He and Alexander Magunia and Harijyoti Mandal and Muwaffaq Ali Mourtada and Carlo Kleine and Arikta Saha and Marc Rebholz and Gergana D. Borisova and Lina Hedewig and Hannes Lindenblatt and Florian Trost and Ulrike Frühling and Christina C. Papadopoulou and Elisa Appi and Stefan Düsterer and Tino Lang and Skirmantas Alisaukas and Christoph M. Heyl and Steffen Palutke and Markus Braune and Christina Bömer and Dietrich Krebs and Doriana Vinci and Philip Mosel and Peer Biesterfeld and Ingmar Hartl and Robert Moshammer and Milutin Kovacev and Kiyoshi Ueda and Mette B. Gaarde and Christian Ott and Thomas Pfeifer},
journal= {arXiv preprint arXiv:2503.16344},
year = {2025}
}