Abstract Rotational dynamics simulations of neutral O molecules driven by linearly, elliptically and circularly polarized femtosecond pulsed lasers are carried out using a full quantum time-dependent wave packet evolution method. Here, the direction of laser propagation is set along the z axis, and the polarization plane is restricted to the xy plane. The results indicate that the alignment of O molecules in the z direction is weakly affected by varying the ellipticity when the total laser intensity is held constant. For rotation within the xy plane, the linearly polarized laser significantly excites rotational motion, with the degree of excitation increasing as the ellipticity increases. In contrast, under the influence of a circularly polarized laser, the angular distribution of O molecules in the xy plane remains isotropic. Additionally, the effects of the initial rotational quantum number, the temperature of the O molecules and the nuclear spin on laser-induced alignment are discussed.
(Vibronic, rovibronic, and rotation-electron-spin interactions)
Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2022YFA1602502) and the National Natural Science Foundation of China (Grant No. 12450404).
Corresponding Authors:
Xiao-Qing Hu
E-mail: xiaoqing-hu@foxmail.com
Cite this article:
Ting Xu(许婷), Jin-Peng Ma(马金鹏), Xiao-Qing Hu(胡晓青), Yin-Song Tang(唐寅淞), Si-Qi Pei(裴思琪), Cong-Cong Jia(贾聪聪), Yong-Wu(吴勇), and Jian-Guo Wang(王建国) Rotational dynamics of neutral O2 driven by linearly, elliptically and circularly polarized femtosecond pulsed lasers 2025 Chin. Phys. B 34 053301
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