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Optimization of extreme ultraviolet vortex beam based on high harmonic generation

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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 mi-croscopy 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 be-tween 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.

high harmonic generationphase matchingextreme ultraviolet vortex beamquantum path inter-ference

肖礴、赵逸文、程方晶、王革文、姜威、王一琛、胡杰、梁红静、马日

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Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China

College of Science,Jilin Institute of Chemical Technology,Jilin 132022,China

国家自然科学基金国家自然科学基金国家自然科学基金National Key Program for science and Technology Research and Development吉林省自然科学基金吉林省自然科学基金Scientific Research Foundation of Jilin Provincial Education Department,China

1197413792250306123043022019YFA0307700YDZJ202101ZYTS157YDZJ202201ZYTS314JJKH20230283KJ

2024

10.1088/1674-1056/ad2bf0

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(5)
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