Spatial Aberrations in High-Order Harmonic Generation  

作　　者：Marius Plach Federico Vismarra Elisa Appi Vénus Poulain Jasper Peschel Peter Smorenburg David PO’Dwyer Stephen Edward Yin Tao Rocío Borrego-Varillas Mauro Nisoli Cord LArnold Anne L’Huillier Per Eng-Johnsson 

机构地区：[1]Department of Physics,Lund University,P.0.Box 118,22100 Lund,Sweden [2]Department of Physics,Politecnico di Milano,20133 Milano,Italy [3]Institute for Photonics and Nanotechnologies,IFN-CNR,20133 Milano,Italy [4]ASML Research,ASML Netherlands B.V.,5504 DR,Veldhoven,Netherlands

出　　处：《Ultrafast Science》2024年第1期35-43,共9页超快科学（英文）

基　　金：support from the Swedish Research Council(2013-8185,2021-04691,2017-04106,and 2021-05992);the European Research Council(advanced grant QPAP,884900);the Knut and Alice Wallenberg Foundation(KAW 2020.0111).

摘　　要：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.

关 键 词：field. HARMONICS DIRECTIONS 

分 类 号：O43[机械工程—光学工程]