Resolving multi-orbital effects on high harmonic generation from aligned N2 molecules in linearly and elliptically polarized intense laser fields
Resolving multi-orbital effects on high harmonic generation from aligned N2 molecules in linearly and elliptically polarized intense laser fields
复制标题
解决线性和椭圆偏振强激光场中排列的 N2 分子产生高次谐波的多轨道效应
DOI：
10.1088/1674-1056/ab3440
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Dajun Ding
中科院分区：
文献类型：
--
作者：
Liang Hong Jing;Xin Fan;Shuang Feng;Liyu Shan;Qinghua Gao;Bo Yan;Ri Ma;Haifeng Xu;Dajun Ding
We perform an experimental study of the multi-orbital effect on the high-order harmonic generation (HHG) from aligned N2 molecules in both linearly and elliptically polarized intense laser fields. Measured by a home-built extreme ultraviolet (XUV) flat grating spectrometer with the pump–probe method, the angular distributions of different orders of HHG are obtained, which show distinctive behaviors for harmonics in the plateau and the cut-off regions. The ellipticity dependence of HHG is investigated by aligning the molecular axis parallel or perpendicular to the laser polarization. Our results indicate that both the highest occupied molecular orbital (HOMO) as well as the lower one (HOMO-1) contribute to the HHG of N2 molecules, in either linearly or elliptically polarized intense laser field. The study paves the way for understanding the ultrafast electron dynamics of molecules exposed to an intense laser field.
