首页|Photoelectron momentum distributions of triatomic CO2 molecules by circularly polarized attosecond pulses

Photoelectron momentum distributions of triatomic CO2 molecules by circularly polarized attosecond pulses

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Molecular-frame photoelectron momentum distributions(MF-PMDs)have been studied for imaging molecular struc-tures.We investigate the MF-PMDs of C02 molecules exposed to circularly polarized(CP)attosecond laser pulses by solving the time-dependent Schrödinger equations based on the single-active-electron approximation frames.Results show that high-frequency photons lead to photoelectron diffraction patterns,indicating molecular orbitals.These diffraction patterns can be illustrated by the ultrafast photoionization models.However,for the driving pulses with 30 nm,a devia-tion between MF-PMDs and theoretically predicted results of the ultrafast photoionization models is produced because the Coulomb effect strongly influences the molecular photoionization.Meanwhile,the MF-PMDs rotate in the same direction as the helicity of driving laser pulses.Our results also demonstrate that the MF-PMDs in a CP laser pulse are the super-position of those in the parallel and perpendicular linearly polarized cases.The simulations efficiently visualize molecular orbital geometries and structures by ultrafast photoelectron imaging.Furthermore,we determine the contribution of HOMO and HOMO-1 orbitals to ionization by varying the relative phase and the ratio of these two orbitals.

molecular-frame photoelectron momentum distributionssingle-active-electron approximation framesultrafast photoionization models

张思琪、张军、郝欣宇、郭静、刘爱华、刘学深

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Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China

School of Physics,Harbin Institute of Technology,Harbin 150001,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Jilin Province of China

119740071207414612074142615750771237426511947243918501141177413120220101016JC

2024

10.1088/1674-1056/ad6b81

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(10)