中国物理B ›› 2024, Vol. 33 ›› Issue (5): 54208-054208.doi: 10.1088/1674-1056/ad2604

• • 上一篇    下一篇

Elliptically polarized high-order harmonic generation of Ar atom in an intense laser field

Jie Hu(胡杰)1, Yi-Chen Wang(王一琛)1, Qiu-Shuang Jing(景秋霜)1, Wei Jiang(姜威)1, Ge-Wen Wang(王革文)1, Yi-Wen Zhao(赵逸文)1, Bo Xiao(肖礴)1, Hong-Jing Liang(梁红静)2,†, and Ri Ma(马日)1,‡   

  1. 1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    2 College of Science, Jilin Institute of Chemical Technology, Jilin 132022, China
  • 收稿日期:2023-12-12 修回日期:2024-01-24 接受日期:2024-02-05 出版日期:2024-05-20 发布日期:2024-05-20
  • 通讯作者: Hong-Jing Liang, Ri Ma E-mail:lianghongjing@jlict.edu.cn;rma@jlu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 92250306, 11974137, and 12304302), the National Key Program for Science and Technology Research and Development of China (Grant No. 2019YFA0307700), the Natural Science Foundation of Jilin Province, China (Grant Nos. YDZJ202101ZYTS157 and YDZJ202201ZYTS314), and the Scientific Research Foundation of the Education Department of Jilin Province, China (Grant No. JJKH20230283KJ).

Elliptically polarized high-order harmonic generation of Ar atom in an intense laser field

Jie Hu(胡杰)1, Yi-Chen Wang(王一琛)1, Qiu-Shuang Jing(景秋霜)1, Wei Jiang(姜威)1, Ge-Wen Wang(王革文)1, Yi-Wen Zhao(赵逸文)1, Bo Xiao(肖礴)1, Hong-Jing Liang(梁红静)2,†, and Ri Ma(马日)1,‡   

  1. 1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    2 College of Science, Jilin Institute of Chemical Technology, Jilin 132022, China
  • Received:2023-12-12 Revised:2024-01-24 Accepted:2024-02-05 Online:2024-05-20 Published:2024-05-20
  • Contact: Hong-Jing Liang, Ri Ma E-mail:lianghongjing@jlict.edu.cn;rma@jlu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 92250306, 11974137, and 12304302), the National Key Program for Science and Technology Research and Development of China (Grant No. 2019YFA0307700), the Natural Science Foundation of Jilin Province, China (Grant Nos. YDZJ202101ZYTS157 and YDZJ202201ZYTS314), and the Scientific Research Foundation of the Education Department of Jilin Province, China (Grant No. JJKH20230283KJ).

摘要: High-order harmonic generation (HHG) of Ar atom in an elliptically polarized intense laser field is experimentally investigated in this work. Interestingly, the anomalous ellipticity dependence on the laser ellipticity ($\varepsilon $) in the lower-order harmonics is observed, specifically in the 13rd-order, which displays a maximal harmonic intensity at $\varepsilon \approx 0.1$, rather than at $\varepsilon = 0$ as expected. This contradicts the general trend of harmonic yield, which typically decreases with the increase of laser ellipticity. In this study, we attribute this phenomenon to the disruption of the symmetry of the wave function by the Coulomb effect, leading to the generation of a harmonic with high ellipticity. This finding provides valuable insights into the behavior of elliptically polarized harmonics and opens up a potential way for exploring new applications in ultrafast spectroscopy and light-matter interactions.

关键词: high-order harmonic generation, Coulomb effect, elliptically polarized intense laser field

Abstract: High-order harmonic generation (HHG) of Ar atom in an elliptically polarized intense laser field is experimentally investigated in this work. Interestingly, the anomalous ellipticity dependence on the laser ellipticity ($\varepsilon $) in the lower-order harmonics is observed, specifically in the 13rd-order, which displays a maximal harmonic intensity at $\varepsilon \approx 0.1$, rather than at $\varepsilon = 0$ as expected. This contradicts the general trend of harmonic yield, which typically decreases with the increase of laser ellipticity. In this study, we attribute this phenomenon to the disruption of the symmetry of the wave function by the Coulomb effect, leading to the generation of a harmonic with high ellipticity. This finding provides valuable insights into the behavior of elliptically polarized harmonics and opens up a potential way for exploring new applications in ultrafast spectroscopy and light-matter interactions.

Key words: high-order harmonic generation, Coulomb effect, elliptically polarized intense laser field

中图分类号:  (Frequency conversion; harmonic generation, including higher-order harmonic generation)

  • 42.65.Ky
33.20.Xx (Spectra induced by strong-field or attosecond laser irradiation) 33.80.-b (Photon interactions with molecules)