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
- 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
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
- 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
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.
中图分类号: (Multiphoton ionization and excitation to highly excited states)
- 32.80.Rm