2023/08/15 by Marius Plach, Plach, Marius, Federico Vismarra +25 · 1 citation
Engineering · Mathematics · Physics and Astronomy · #Acoustics #Atomic Physics (physics.atom-ph) #Deformable mirror #Divergence (linguistics) #FOS: Physical sciences #Field (mathematics) #Harmonic #Harmonics #High harmonic generation #Laser #Laser Design and Applications #Laser-Matter Interactions and Applications #Mathematics #Optics #Optics (physics.optics) #Physics #Position (finance) #Spectroscopy and Quantum Chemical Studies #Spherical harmonics #Superposition principle #Wavefront
paper · pdf · doi:10.48550/arxiv.2308.08018
published in arXiv (Cornell University) (Cornell University)
openalex publication_date 2023/08/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.