Relative phase-dependent two-electron emission dynamics with two-color circularly polarized laser fields

• 作者: Lian-Lian Zhang Tong-Tong Xu Wei-Jiang Gong Zhao Jin
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2020,（9）
• 所属期刊栏目: ATOMIC AND MOLECULAR PHYSICS
• 页码范围: 312-319
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab928c

摘要

With the semiclassical ensemble model,we explore the relative phase-dependent nonsequential double ionization (NSDI) of Mg by counter-rotating two-color circularly polarized (TCCP) laser pulses.The yield of Mg2+ sensitively depends on the relative phase △φ and the intensity of TCCP laser fields.At △φ =1.5π,the yield of Mg2+ exhibits a pronounced peak in the 0.05 PW/cm2 laser field.This behavior results from the increase of the initial transverse velocity compensating for the drift velocity with the decreasing angle by analyzing the angular distributions of the electron pairs in four relative phases.By changing the relative phases,we find that the recollision excitation with subsequent ionization and the recollision-impact ionization mechanisms can be controlled with TCCP laser fields.