中国物理B ›› 2012, Vol. 21 ›› Issue (2): 24210-024210.doi: 10.1088/1674-1056/21/2/024210

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吴艳1,叶会亮1,邵初寅2,张敬涛1   

  • 收稿日期:2011-06-28 修回日期:2011-08-29 出版日期:2012-01-30 发布日期:2012-01-30
  • 通讯作者: 张敬涛,jtzhang@siom.ac.cn E-mail:jtzhang@siom.ac.cn

A scaling law of high-order harmonic generation

Wu Yan(吴艳)a), Ye Hui-Liang(叶会亮)a), Shao Chu-Yin(邵初寅)b), and Zhang Jing-Tao(张敬涛)a)   

  1. a. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
    b. Changshu Institute of Technology, Changshu 215500, China
  • Received:2011-06-28 Revised:2011-08-29 Online:2012-01-30 Published:2012-01-30
  • Contact: Zhang Jing-Tao,jtzhang@siom.ac.cn E-mail:jtzhang@siom.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10774153 and 61078080) and the National Basic Research Program of China (Grant Nos. 2010CB923203 and 2011CB808103).

Abstract: Using a nonperturbative quantum electrodynamics theory of high-order harmonic generation (HHG), a scaling law of HHG is established. The scaling law states that when the atomic binding energy Eb, the wavelength $\lambda$ and the intensity I of the laser field change simultaneously to kEb, $\lambda$/k, and k3I, respectively. The characteristics of the HHG spectrum remain unchanged, while the harmonic yield is enhanced k3 times. That HHG obeys the same scaling law with above-threshold ionization is a solid proof of the fact that the two physical processes have similar physical mechanisms. The variation of integrated harmonic yields is also discussed.

Key words: high-order harmonic generation, scaling law, harmonic yield, nonperturbative quantum electrodynamics

中图分类号:  (Frequency conversion; harmonic generation, including higher-order harmonic generation)

  • 42.65.Ky
32.80.Fb (Photoionization of atoms and ions) 32.80.Rm (Multiphoton ionization and excitation to highly excited states)