Spatial aberrations in high-order harmonic generation
Optics
2023-08-17 v1 Atomic Physics
Abstract
We investigate the spatial characteristics of high-order harmonic radiation generated in argon, and observe cross-like patterns in the far field. An analytical model describing harmonics from an astigmatic driving beam reveals that these patterns result from the order and generation position dependent divergence of harmonics. Even small amounts of driving field astigmatism may result in cross-like patterns, coming from the superposition of individual harmonics with spatial profiles elongated in different directions. By correcting the aberrations using a deformable mirror, we show that fine-tuning the driving wavefront is essential for optimal spatial quality of the harmonics.
Cite
@article{arxiv.2308.08018,
title = {Spatial aberrations in high-order harmonic generation},
author = {Marius Plach and Federico Vismarra and Elisa Appi and Vénus Poulain and Jasper Peschel and Peter Smorenburg and David P. O'Dwyer and Stephen Edward and Yin Tao and Rocío Borrego-Varillas and Mauro Nisoli and Cord L. Arnold and Anne L'Huillier and Per Eng-Johnsson},
journal= {arXiv preprint arXiv:2308.08018},
year = {2023}
}