中国物理B ›› 2025, Vol. 34 ›› Issue (6): 63202-063202.doi: 10.1088/1674-1056/adcb9d
所属专题： SPECIAL TOPIC — Ultrafast physics in atomic, molecular and optical systems
High-order harmonic generation of methane in an elliptically polarized field
Shu-Shan Zhou(周书山)1, Yu-Long Li(李玉龙)2, Zhi-Xue Zhao(赵志学)1, Man Xing(幸满)3, Nan Xu(许楠)1, Hao Wang(王浩)1, Jun Wang(王俊)3, Xi Zhao(赵曦)4, and Mu-Hong Hu(胡木宏)1,†
- 1 School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China;
2 Beijing Institute of Space Launch Technology, Beijing 100076, China;
3 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
4 School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
High-order harmonic generation of methane in an elliptically polarized field
Shu-Shan Zhou(周书山)1, Yu-Long Li(李玉龙)2, Zhi-Xue Zhao(赵志学)1, Man Xing(幸满)3, Nan Xu(许楠)1, Hao Wang(王浩)1, Jun Wang(王俊)3, Xi Zhao(赵曦)4, and Mu-Hong Hu(胡木宏)1,†
- 1 School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China;
2 Beijing Institute of Space Launch Technology, Beijing 100076, China;
3 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
4 School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
摘要： We performed real-time and real-space numerical simulations of high-order harmonic generation in the three-dimensional structured molecule methane (CH$_{4}$) using time-dependent density functional theory. By irradiating the methane molecule with an elliptically polarized laser pulse polarized in the \( x \)-\( y \) plane, we observed significant even-order harmonic emission in the \( z \)-direction. By analyzing the electron dynamics in the electric field and the multi-orbital effects of the molecule, we revealed that electron recombination near specific atoms in methane is the primary source of high-order harmonic generation in the \( z \)-direction. Furthermore, we identified the dominant molecular orbitals responsible for the enhancement of harmonics in this direction and demonstrated the critical role played by multi-orbital effects in this process.
中图分类号: (Multiphoton ionization and excitation to highly excited states)
- 32.80.Rm