中国物理B ›› 2014, Vol. 23 ›› Issue (4): 43201-043201.doi: 10.1088/1674-1056/23/4/043201

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Origin of diffraction fringes in two-dimensional photoelectronmomentum distributions for single ionization of atoms in few-cycle intense laser pulses

郭志坚a, 陈长进b, 周效信a   

  1. a College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;
    b Department of Physics, College of Science, Shantou University, Shantou 515063, China
  • 收稿日期:2013-08-17 修回日期:2013-09-14 出版日期:2014-04-15 发布日期:2014-04-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11274219 and 11264036), the STU Scientific Research Foundation for Talents, and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, China.

Origin of diffraction fringes in two-dimensional photoelectronmomentum distributions for single ionization of atoms in few-cycle intense laser pulses

Guo Zhi-Jian (郭志坚)a, Chen Zhang-Jin (陈长进)b, Zhou Xiao-Xin (周效信)a   

  1. a College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;
    b Department of Physics, College of Science, Shantou University, Shantou 515063, China
  • Received:2013-08-17 Revised:2013-09-14 Online:2014-04-15 Published:2014-04-15
  • Contact: Chen Zhang-Jin E-mail:chenzj@stu.edu.cn
  • About author:32.80.Rm; 32.80.Fb
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11274219 and 11264036), the STU Scientific Research Foundation for Talents, and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, China.

摘要: We use the strong field approximation with a time window function controlling the release time of electrons to study the intra-cycle and inter-cycle interferences in few-cycle intense laser pulses impinging on He. The diffraction fringes, i.e., the vertical stripe-like structure, observed in the experimental two-dimensional photoelectron momentum distributions of Gopal et al. (2009 Phys. Rev. Lett. 103 053001) have been attributed to the interplay of the intra-and inter-cycle interferences. The pure numerical calculations by solving the time-dependent Schrödinger equation are also performed and the results are compared with the experimental measurements directly. It has been found that the position of the stripe-like structure can be used to determine the duration of the laser pulses used in experiments.

关键词: intra-cycle and inter-cycle interferences, stripe-like structure, two-dimensional momentum distributions

Abstract: We use the strong field approximation with a time window function controlling the release time of electrons to study the intra-cycle and inter-cycle interferences in few-cycle intense laser pulses impinging on He. The diffraction fringes, i.e., the vertical stripe-like structure, observed in the experimental two-dimensional photoelectron momentum distributions of Gopal et al. (2009 Phys. Rev. Lett. 103 053001) have been attributed to the interplay of the intra-and inter-cycle interferences. The pure numerical calculations by solving the time-dependent Schrödinger equation are also performed and the results are compared with the experimental measurements directly. It has been found that the position of the stripe-like structure can be used to determine the duration of the laser pulses used in experiments.

Key words: intra-cycle and inter-cycle interferences, stripe-like structure, two-dimensional momentum distributions

中图分类号:  (Multiphoton ionization and excitation to highly excited states)

  • 32.80.Rm
32.80.Fb (Photoionization of atoms and ions)