中国物理B ›› 2026, Vol. 35 ›› Issue (6): 64210-064210.doi: 10.1088/1674-1056/ae64cd

• • 上一篇    下一篇

Resonance-enhanced high-harmonic generation and attosecond transient absorption spectroscopy of hydrogen atoms

Yue Cao(曹玥), Zheng Shu(舒正)†, Da-Wei Tian(田大纬), and Xiao-Lei Hao(郝小雷)   

  1. State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China
  • 收稿日期:2025-12-29 修回日期:2026-04-16 接受日期:2026-04-27 发布日期:2026-06-18
  • 通讯作者: Zheng Shu E-mail:zheng_shu@sxu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Grant Nos. 12304304 and 12274273).

Resonance-enhanced high-harmonic generation and attosecond transient absorption spectroscopy of hydrogen atoms

Yue Cao(曹玥), Zheng Shu(舒正)†, Da-Wei Tian(田大纬), and Xiao-Lei Hao(郝小雷)   

  1. State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China
  • Received:2025-12-29 Revised:2026-04-16 Accepted:2026-04-27 Published:2026-06-18
  • Contact: Zheng Shu E-mail:zheng_shu@sxu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant Nos. 12304304 and 12274273).

摘要: Using ab initio simulations, we investigate high-harmonic generation in hydrogen atoms driven by a near-infrared (NIR) laser pulse combined with an attosecond extreme-ultraviolet (XUV) pulse. The efficiency of high-harmonic generation is significantly enhanced when the XUV pulse excites atoms from the ground state to an excited p state. Furthermore, by varying the time delay between the two laser pulses, we calculate the attosecond transient absorption spectra of hydrogen atoms based on numerical solutions of the time-dependent Schrödinger equation (TDSE). Combining attosecond transient absorption spectra with high-harmonic spectra provides a powerful approach for revealing laser-induced energy-level shifts and the splitting structure of resonant harmonic emission.

关键词: resonance harmonic emission, ac Stark effect, attosecond transient absorption spectra

Abstract: Using ab initio simulations, we investigate high-harmonic generation in hydrogen atoms driven by a near-infrared (NIR) laser pulse combined with an attosecond extreme-ultraviolet (XUV) pulse. The efficiency of high-harmonic generation is significantly enhanced when the XUV pulse excites atoms from the ground state to an excited p state. Furthermore, by varying the time delay between the two laser pulses, we calculate the attosecond transient absorption spectra of hydrogen atoms based on numerical solutions of the time-dependent Schrödinger equation (TDSE). Combining attosecond transient absorption spectra with high-harmonic spectra provides a powerful approach for revealing laser-induced energy-level shifts and the splitting structure of resonant harmonic emission.

Key words: resonance harmonic emission, ac Stark effect, attosecond transient absorption spectra

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)