【摘要】 通过计算线偏振双脉冲激光场与一维氢原子模型相互作用产生的高次谐波辐射谱的含时Schrdinger方程.研究发现,选用适宜的双脉冲激光组合可以增加谐波谱的密度,这样的谐波谱特别适合作为产生孤立阿秒脉冲的光源.详细地分析了谐波谱线密度增加的物理机理,给出不同脉宽与谐波谱线密度增加的关系,从而可以有针对性地控制谐波谱线的疏密程度.更多还原

【Abstract】 By numerically solving time-dependent Schrdinger equation,we obtain high-order harmonic generation (HHG) spectra from the one-dimensional H atom model submitted to linear polarization bichromatic field. It is found that,appropriate bichromatic field could be a source of attosecond pulse generation since it produces a ligher line-density in harmonic generation spectra (HGS). Based on it,we analyze the mechanism of generating denser HHG spectral lines in detail,and give density-selection numerical experiential formulas for different pulses duration,to achieve further control of the line density of HGS.更多还原