摘要
在含时密度泛函理论框架下,采用经典和量子相结合的模型,模拟了氢分子在超强飞秒激光脉冲作用下的高次谐波行为.结果表明氢分子的高次谐波谱具有“下降—平台—截止”的结构和偶次谐波被禁闭仅出现奇次谐波的选择性特征;不同的激光偏振方向会导致高次谐波的截止频率和谱线强度的变化.
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 H2 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.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第6期2972-2976,共5页
Acta Physica Sinica
基金
江苏省普通高校自然科学研究计划基金资助的课题~~
