中国物理B ›› 2024, Vol. 33 ›› Issue (1): 13201-13201.doi: 10.1088/1674-1056/ad0e5d

所属专题: SPECIAL TOPIC — States and new effects in nonequilibrium

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Attosecond ionization time delays in strong-field physics

Yongzhe Ma(马永哲), Hongcheng Ni(倪宏程), and Jian Wu(吴健)   

  1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China
  • 收稿日期:2023-10-12 修回日期:2023-11-17 接受日期:2023-11-21 出版日期:2023-12-13 发布日期:2024-01-03
  • 通讯作者: Hongcheng Ni, Jian Wu E-mail:hcni@lps.ecnu.edu.cn;jwu@phy.ecnu.edu.cn
  • 基金资助:
    We would like to thank Mingyu Zhu for careful proofreading. Project supported by the National Natural Science Foundation of China (Grant Nos. 92150105, 11834004, 12227807, and 12241407) and the Science and Technology Commission of Shanghai Municipality (Grant No. 21ZR1420100).

Attosecond ionization time delays in strong-field physics

Yongzhe Ma(马永哲), Hongcheng Ni(倪宏程), and Jian Wu(吴健)   

  1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China
  • Received:2023-10-12 Revised:2023-11-17 Accepted:2023-11-21 Online:2023-12-13 Published:2024-01-03
  • Contact: Hongcheng Ni, Jian Wu E-mail:hcni@lps.ecnu.edu.cn;jwu@phy.ecnu.edu.cn
  • Supported by:
    We would like to thank Mingyu Zhu for careful proofreading. Project supported by the National Natural Science Foundation of China (Grant Nos. 92150105, 11834004, 12227807, and 12241407) and the Science and Technology Commission of Shanghai Municipality (Grant No. 21ZR1420100).

摘要: Electronic processes within atoms and molecules reside on the timescale of attoseconds. Recent advances in the laser-based pump-probe interrogation techniques have made possible the temporal resolution of ultrafast electronic processes on the attosecond timescale, including photoionization and tunneling ionization. These interrogation techniques include the attosecond streak camera, the reconstruction of attosecond beating by interference of two-photon transitions, and the attoclock. While the former two are usually employed to study photoionization processes, the latter is typically used to investigate tunneling ionization. In this review, we briefly overview these timing techniques towards an attosecond temporal resolution of ionization processes in atoms and molecules under intense laser fields. In particular, we review the backpropagation method, which is a novel hybrid quantum-classical approach towards the full characterization of tunneling ionization dynamics. Continued advances in the interrogation techniques promise to pave the pathway towards the exploration of ever faster dynamical processes on an ever shorter timescale.

关键词: strong-field ionization, attosecond, time delay, photoionization time delay, tunneling time delay, attosecond streak camera, reconstruction of attosecond beating by interference of two-photon transitions (RABBITT), attoclock, backpropagation

Abstract: Electronic processes within atoms and molecules reside on the timescale of attoseconds. Recent advances in the laser-based pump-probe interrogation techniques have made possible the temporal resolution of ultrafast electronic processes on the attosecond timescale, including photoionization and tunneling ionization. These interrogation techniques include the attosecond streak camera, the reconstruction of attosecond beating by interference of two-photon transitions, and the attoclock. While the former two are usually employed to study photoionization processes, the latter is typically used to investigate tunneling ionization. In this review, we briefly overview these timing techniques towards an attosecond temporal resolution of ionization processes in atoms and molecules under intense laser fields. In particular, we review the backpropagation method, which is a novel hybrid quantum-classical approach towards the full characterization of tunneling ionization dynamics. Continued advances in the interrogation techniques promise to pave the pathway towards the exploration of ever faster dynamical processes on an ever shorter timescale.

Key words: strong-field ionization, attosecond, time delay, photoionization time delay, tunneling time delay, attosecond streak camera, reconstruction of attosecond beating by interference of two-photon transitions (RABBITT), attoclock, backpropagation

中图分类号:  (Photoionization of atoms and ions)

  • 32.80.Fb
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 32.80.Rm (Multiphoton ionization and excitation to highly excited states)