Modulation of High-Order Harmonic Generation from a Monolayer ZnO by Co-rotating Two-Color Circularly Polarized Laser Fields  

作　　者：乔月 陈家祺 周书山 陈基根 蒋士成 杨玉军 Yue Qiao;Jiaqi Chen;Shushan Zhou;Jigen Chen;Shicheng Jiang;Yujun Yang(School of Materials Science and Engineering,Taizhou University,Jiaojiang 318000,China;Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China;Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy(Jilin University),Changchun 130012,China;School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China;State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China)

机构地区：[1]School of Materials Science and Engineering,Taizhou University,Jiaojiang 318000,China [2]Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China [3]Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy(Jilin University),Changchun 130012,China [4]School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China [5]State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China

出　　处：《Chinese Physics Letters》2024年第1期34-38,共5页中国物理快报（英文版）

基　　金：supported by the Zhejiang Provincial Natural Science Foundation of China(Grant Nos.Y23A040001 and LY21F050001);the National Key Research and Development Program of China(Grant No.2019YFA0307700),the National Natural Science Foundation of China(Grant Nos.12074145,11774219,11975012,12374029,12304378,and 12204214);the Jilin Provincial Research Foundation for Basic Research,China(Grant No.20220101003JC);the Foundation of Education Department of Liaoning Province,China(Grant No.LJKMZ20221435);the National College Students Innovation and Entrepreneurship Training Program(Grant No.202310350062).

摘　　要：By numerically solving the two-dimensional semiconductor Bloch equation,we study the high-order harmonic emission of a monolayer ZnO under the driving of co-rotating two-color circularly polarized laser pulses.By changing the relative phase between the fundamental frequency field and the second one,it is found that the harmonic intensity in the platform region can be significantly modulated.In the higher order,the harmonic intensity can be increased by about one order of magnitude.Through time-frequency analysis,it is demonstrated that the emission trajectory of monolayer ZnO can be controlled by the relative phase,and the harmonic enhancement is caused by the second quantum trajectory with the higher emission probability.In addition,near-circularly polarized harmonics can be generated in the co-rotating two-color circularly polarized fields.With the change of the relative phase,the harmonics in the platform region can be altered from left-handed near-circularly polarization to right-handed one.Our results can obtain high-intensity harmonic radiation with an adjustable ellipticity,which provides an opportunity for syntheses of circularly polarized attosecond pulses.

关 键 词：POLARIZATION ROTATING HARMONIC 

分 类 号：O471.1[理学—半导体物理]