Spatial Aberrations in High-Order Harmonic Generation

Summary, in English

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.

• Författare: Marius Plach; Federico Vismarra; Elisa Appi; Vénus Poulain; Jasper Peschel; Peter Smorenburg; David P. O’Dwyer; Stephen Edward; Yin Tao; Rocío Borrego-Varillas; Mauro Nisoli; Cord L. Arnold; Anne L’Huillier; Per Eng-Johnsson
• Avdelning/ar: Atomfysik; LU profilområde: Ljus och material; LTH profilområde: Avancerade ljuskällor; NanoLund: Centre for Nanoscience; LTH profilområde: Nanovetenskap och halvledarteknologi; Lunds lasercentrum, LLC
• Publiceringsår: 2024-01
• Språk: Engelska
• Publikation/Tidskrift/Serie: Ultrafast Science
• Volym: 4
• Länkar: http://dx.doi.org/10.34133/ultrafastscience.0054
• Dokumenttyp: Artikel i tidskrift
• Förlag: American Association for the Advancement of Science (AAAS)
• Ämne: Atom and Molecular Physics and Optics
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 2097-0331