少周期XUV激光中氢分子离子单光子电离理论研究
Theoretical calculation for single-photon ionization of molecular hydrogen ion in a few-cycle XUV laser field

通过数值求解二维含时薛定谔方程研究了氢分子离子在圆偏振XUV少周期激光电场中的单光子电离，结果观察到不同核间距的氢分子离子的光电子能谱的能移现象. 分析表明，在少周期激光场宽频情况下，分子电离电子的双中心干涉改变了夫兰克-康登因子的单调递减趋势，使不同核间距氢分子离子的光电子能谱出现能量移动.
We theoretically study the ionization of hydrogen molecular ion in a few-cycle XUV laser field by solving 2D time-dependent Schr？dinger equation. In our numerical results, we found that there are energy shifts of photoelectron energy spectra of hydrogen molecular ion. By analysis, when the spectral width of the laser pulses is broad, we found that the two-center interference changes the monotone decreasing trend of Franck-Condon factors, which cause energy shifts of photoelectron energy spectra of hydrogen molecular ion with different nuclear distances.