任意偏振激光作用下二维模型H原子的谐波发射

High order harmonic generation from a two-dimensional model H atom in arbitrary polarized laser

采用二维渐近边界条件和辛算法数值求解了任意偏振激光和H原子相互作用的二维含时Schrdinger方程的无穷空间初值问题.计算了二维H原子在不同偏振激光作用下的谐波发射,得到各种椭圆率下谐波谱的特点与已有文献结果一致.通过电子的基态布居概率和某一时刻的概率密度分布以及电子的平均位移,对不同椭圆率下谐波谱的特点进行了分析.结果表明,将渐近边界条件和辛算法推广到二维是合理和有效的.

The two-dimensional time-dependent Schrdinger equation of arbitrary polarized laser pulse interacting with a model H atom is solved by using the two-dimensional asymptotic boundary condition （ABC） and symplectic algorithm.In order to investigate the influence of ellipticity on high order harmonic generation （HHG） of atom in arbitrary polarized laser field,we consider different ellipticities,and then compute the HHG for two-dimensional model H atom.Finally,we analyze the characteristics of HHG under different polarized laser fields.So it is reasonable and effective to extend the one-dimensional ABC and symplectic algorithm to the problem of laser interacting with a two-dimensional model atom.