Optimization of extreme ultraviolet vortex beam based on high harmonic generation  

作　　者：肖礴 赵逸文 程方晶 王革文 姜威 王一琛 胡杰 梁红静 马日 Bo Xiao;Yi-Wen Zhao;Fang-Jing Cheng;Ge-Wen Wang;Wei Jiang;Yi-Chen Wang;Jie Hu;Hong-Jing Liang;Ri Ma(Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China;College of Science,Jilin Institute of Chemical Technology,Jilin 132022,China)

机构地区：[1]Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China [2]College of Science,Jilin Institute of Chemical Technology,Jilin 132022,China

出　　处：《Chinese Physics B》2024年第5期459-464,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11974137,92250306,and 12304302);the National Key Program for Science and Technology Research and Development(Grant No.2019YFA0307700);the Natural Science Foundation of Jilin Province,China(Grant Nos.YDZJ202101ZYTS157 and YDZJ202201ZYTS314);the Scientific Research Foundation of Jilin Provincial Education Department,China(Grant No.JJKH20230283KJ)。

摘　　要：In high harmonic generation(HHG),Laguerre–Gaussian(LG) beams are used to generate extreme ultraviolet(XUV)vortices with well-defined orbital angular momentum(OAM),which have potential applications in fields such as microscopy and spectroscopy.An experimental study on the HHG driven by vortex and Gaussian beams is conducted in this work.It is found that the intensity of vortex harmonics is positively correlated with the laser energy and gas pressure.The structure and intensity distribution of the vortex harmonics exhibit significant dependence on the relative position between the gas jet and the laser focus.The ring-like structures observed in the vortex harmonics,and the interference of quantum paths provide an explanation for the distinct structural characteristics.Moreover,by adjusting the relative position between the jet and laser focus,it is possible to discern the contributions from different quantum paths.The optimization of the HH vortex field is applicable to the XUV,which opens up a new way for exploiting the potential in optical spin or manipulating electrons by using the photon with tunable orbital angular momentum.

关 键 词：high harmonic generation phase matching extreme ultraviolet vortex beam quantum path interference 

分 类 号：O436[机械工程—光学工程]