On the cutoff law of laser induced high harmonic spectra

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 Up and the atomic biding energy Ip, with coefficients 3.17 and 1.32, respectively. Even though, this law has been th...

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Bibliographic Details
Published in:物理学前沿：英文版 2015 (2), p.91-96
Main Author: Dong-Sheng Guo Chao Yu Jingtao Zhang Ju Gao Zhi-Wei Sun Zhenrong Sun
Format: Article
Language:English
Subjects:
基础物理学
激光诱导
爱因斯坦
相互作用能
线性组合
背景信息
贝塞尔函数
高次谐波谱
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Summary: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 Up and the atomic biding energy Ip, 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√2 ≈ 3.34 and 2√2-1≈1.83, respectively. A recent spectra calculation and an experimental measurement support the new cutoff law.
ISSN:2095-0462
2095-0470