On the cutoff law of laser induced high harmonic spectra

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• 作者：Dong-Sheng Guo (1) (2)
  Chao Yu (1)
  Jingtao Zhang (3)
  Ju Gao (4)
  Zhi-Wei Sun (5)
  Zhenrong Sun (1)
  
  1. State Key Laboratory of Precision Spectroscopy ; Department of Physics ; East China Normal University ; Shanghai ; 200062 ; China
  2. School of Physics ; Peking University ; Beijing ; 100871 ; China
  3. State Key Laboratory of High-field Laser Physics ; Shanghai Institute of Optical and Fine Mechanics ; Chinese Academy of Sciences ; Shanghai ; 201800 ; China
  4. Jingpin Opto-Electronic Co. ; Jiangsu FOHO Science Park ; Fenhu Town ; Wujiang ; 215211 ; China
  5. Key Laboratory of Microgravity ; Institute of Mechanics ; Chinese Academy of Sciences ; Beijing ; 100190 ; China
  
• 关键词：high harmonic generation ; cutoff law ; strong laser physics ; nonperturbative quantum electrodynamics ; Bessel functions ; Einstein photoelectric effect
• 刊名：Frontiers of Physics
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：10
• 期：2
• 页码：209-214
• 全文大小：279 KB
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  17. C. Yu, J. T. Zhang, Z.-W Sun, Z. R. Sun, and D.-S. Guo, A nonperturbativ quantum electrodynamic approach to the theory of laser induced high harmonic generation, / Front. Phys., 2014, DOI 10.1007/s11467-014-0429-x
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Chinese Library of Science
  
• 出版者：Higher Education Press, co-published with Springer-Verlag GmbH
• ISSN：2095-0470

文摘

The currently well accepted cutoff law for laser induced high harmonic spectra predicts the cutoff energy as a linear combination of two interaction energies, the ponderomotive energy U p and the atomic biding energy I p , with coefficients 3.17 and 1.32, respectively. Even though, this law has been there for twenty years or so, the background information for these two constants, such as how they relate to fundamental physics and mathematics constants, is still unknown. This simple fact, keeps this cutoff law remaining as an empirical one. Based on the cutoff property of Bessel functions and the Einstein photoelectric law in the multiphoton case, we show these two coefficients are algebraic constants, \(9 - 4\sqrt 2 \approx 3.34\) and \(2\sqrt 2 - 1 \approx 1.83\) , respectively. A recent spectra calculation and an experimental measurement support the new cutoff law.