摘要
We theoretically investigate multiple electron rescatterings in high-order harmonic generation with a wide range of driving laser wavelengths. In order to obtain a clear and intuitive insight, the time-frequency analysis of the dipole acceleration calculated by the numerical solution of the time-dependent SchrSdinger equation is per- formed and compared with the classical electron trajectory calculation. The result shows that in the mid-infrared regime, the high-order electron trajectory associated with multiple rescatterings plays a more important role than the usually referred-to ＂long and ＂short＂ electron trajectories. To provide quantitative evidence, the strong-field approximation is used to calculate the yield ratio of the high-order harmonic generation from the first rescattering and the multiple rescatterings.
We theoretically investigate multiple electron rescatterings in high-order harmonic generation with a wide range of driving laser wavelengths. In order to obtain a clear and intuitive insight, the time-frequency analysis of the dipole acceleration calculated by the numerical solution of the time-dependent SchrSdinger equation is per- formed and compared with the classical electron trajectory calculation. The result shows that in the mid-infrared regime, the high-order electron trajectory associated with multiple rescatterings plays a more important role than the usually referred-to ＂long and ＂short＂ electron trajectories. To provide quantitative evidence, the strong-field approximation is used to calculate the yield ratio of the high-order harmonic generation from the first rescattering and the multiple rescatterings.
基金
supported by the National Natural Science Foundation of China(Nos.11127901,61221064,60921004,11134010,11227902
11222439,11274325,11404356,61108012,and 11474223)
the National973 Project of China(No.2011CB808103)
the Zhejiang Provincial Natural Science Foundation of China(No.LY14F050008)
the Shanghai Commission of Scienceand Technology Yangfan Project(No.14YF1406000)
the Shanghai Institute of Optics and Fine Mechanics Specialized Research Fund(No.1401561J00)
the Open Fund of the State Key Laboratory of High Field Laser Physics
