Decoding the electron dynamics in high-order harmonic generation from asymmetric molecular ions in elliptically polarized laser fields

• 作者: Cai-Ping Zhang Xiang-Yang Miao
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2022,（4）
• 所属期刊栏目: ATOMIC AND MOLECULAR PHYSICS
• 页码范围: 324-329
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/ac29b0

摘要

The high-order harmonic generation from an asymmetric molecular ion is theoretically investigated based on the Born-Oppenheimer model with two-dimensional electron dynamics.It is shown that the harmonic intensity changes peri-odically in elliptically polarized laser fields.The periodical character is ellipticity-dependent.By establishing the physical image,the periodicity of the harmonic intensity can be ascribed to the contributions of the ground state and the excited state.Furthermore,the electron dynamics from different electronic states can be selected via combining the elliptically polarized laser field with a static electric field.The harmonics dominated either by ground state or excited state are emitted once in an optical cycle in the combined laser field.