中国物理B ›› 2014, Vol. 23 ›› Issue (1): 13102-013102.doi: 10.1088/1674-1056/23/1/013102

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Effects of pressure and gas-jet thickness on the generation of attosecond pulse

李小勇a b, 王国利a, 周效信a   

  1. a College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;
    b Experimental Center, Northwest University for Nationalities, Lanzhou 730030, China
  • 收稿日期:2013-06-03 修回日期:2013-08-16 出版日期:2013-11-12 发布日期:2013-11-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11264036 and 11064013).

Effects of pressure and gas-jet thickness on the generation of attosecond pulse

Li Xiao-Yong (李小勇)a b, Wang Guo-Li (王国利)a, Zhou Xiao-Xin (周效信)a   

  1. a College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;
    b Experimental Center, Northwest University for Nationalities, Lanzhou 730030, China
  • Received:2013-06-03 Revised:2013-08-16 Online:2013-11-12 Published:2013-11-12
  • Contact: Zhou Xiao-Xin E-mail:zhouxx@nwnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11264036 and 11064013).

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摘要： We investigate how the intensity and duration of an attosecond pulse generated from high-order harmonic generation are affected by the pressure and thickness of the gas jet by taking into account the macroscopic propagation of both fundamental and harmonic fields. Our simulations show that, limited by the propagation effects, especially the absorption of harmonics, the intensity of an attosecond pulse cannot be improved by just independently increasing the gas pressure or the medium length. On the other hand, due to good phase-matching conditions, the duration of a generated attosecond pulse can be improved by changing the gas pressure.

关键词: high-order harmonic generation, attosecond pulse, macroscopic propagation

Abstract: We investigate how the intensity and duration of an attosecond pulse generated from high-order harmonic generation are affected by the pressure and thickness of the gas jet by taking into account the macroscopic propagation of both fundamental and harmonic fields. Our simulations show that, limited by the propagation effects, especially the absorption of harmonics, the intensity of an attosecond pulse cannot be improved by just independently increasing the gas pressure or the medium length. On the other hand, due to good phase-matching conditions, the duration of a generated attosecond pulse can be improved by changing the gas pressure.

Key words: high-order harmonic generation, attosecond pulse, macroscopic propagation

中图分类号:  (Time-dependent phenomena: excitation and relaxation processes, and reaction rates)

  • 31.70.Hq
42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 42.25.Bs (Wave propagation, transmission and absorption)