High-order harmonic generation of hydrogen molecule irradiated by ultra-strong femto-second laser pulse--a simulation via TDDFT
超强飞秒激光脉冲作用下氢分子的高次谐波行为——基于含时密度泛函理论的模拟

The high order harmonic generation (HHG) of hydrogen molecule irradiated by ultra-strong femto-second laser pulse is simulated by the TTDFT method with the classical and quantum combination technique. The results indicate that the HHG spectra of H-2 have a \!decrease-plateau-cutoff" structure. A kind of \!odd allowed, even forbidden" selective phenomenon of the order number of HHG is observed. Change in polarization direction of laser beam may change the cut-off order and spectrum intensity of HHG simultaneously.