文献类型：期刊文献

英文题名：Controlling polarization of high-order harmonic generation by molecular alignment in a bicircular laser field

作者：Li, Mu-Zi[1,2];Xu, Yan[3];Jia, Guang-Rui[4];Bian, Xue-Bin[1]

第一作者：Li, Mu-Zi

通讯作者：Bian, XB[1]

机构：[1]Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China;[2]Univ Chinese Acad Sci, Sch Phys Sci, Beijing, Peoples R China;[3]Xinxiang Univ, Coll Phys & Elect Engn, Xinxiang 453003, Henan, Peoples R China;[4]Henan Normal Univ, Coll Phys & Mat Sci, Xinxiang 453007, Henan, Peoples R China

第一机构：Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China

通讯机构：[1]corresponding author), Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China.

年份：2019

卷号：100

期号：3

外文期刊名：PHYSICAL REVIEW A

收录：;EI(收录号：20193907477648);Scopus(收录号：2-s2.0-85072637839);WOS:【SCI-EXPANDED(收录号:WOS:000485759300004)】；

基金：This work was supported by the National Natural Science Foundation of China (Grants No. 11674363 and No. 91850121), the Science Fund of Educational Department of Henan Province of China (Grant No. 2011C140001), and the Ninth Group of Key Disciplines in Henan Province (Grant No. 2018119).

语种：英文

外文关键词：Alignment - Harmonic generation - Polarization

摘要：The polarization of high-order harmonic generation in H-2(+) driven by a counterrotating bichromatic omega/3 omega circularly polarized laser field is investigated theoretically. The elliptically polarized harmonics are characterized by ellipticity and rotation angle, where the latter is expanded to [-pi/2, pi/2] by an optimized definition. We find a critical alignment angle where the ellipticity of high-energy harmonics is almost the same, so an attosecond pulse train with a high degree of polarization can be synthesized. In addition, we find that the rotation angle is always different from the alignment angle by 90 degrees with a small deflection. Thus, we propose a scheme to control the harmonic polarization state by the molecular alignment angle.