| Title | Intensity-dependent two-electron emission dynamics with orthogonally polarized two-color laser fields |
| Authors | Yuan, Zongqiang Ye, Difa Xia, Qinzhi Liu, Jie Fu, Libin |
| Affiliation | Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China. Peking Univ, Ctr Appl Phys & Technol, HEDPS, Beijing 100084, Peoples R China. |
| Keywords | MULTIPHOTON IONIZATION HARMONIC-GENERATION LIGHT |
| Issue Date | 2015 |
| Publisher | PHYSICAL REVIEW A |
| Citation | PHYSICAL REVIEW A.2015,91,(6). |
| Abstract | In this paper, we explore the intensity-dependent strong-field double ionization of Ne with orthogonally polarized two-color laser pulses consisting of 800- and 400-nm laser fields. The yield of Ne2+ as a function of the relative phase Delta phi of the two colors experiences a qualitative transition as the laser intensity decreases from the saturation regime to the far-below-saturation regime. In the saturation regime, our simulations well reproduce the recent experimental observations [Phys. Rev. Lett. 112, 193002 (2014)]. Turning to the far-below-saturation regime, however, we find that the observed small knee structure totally disappears and the maximum yield of Ne2+ is shifted by a pi/2 phase. This is explained by the competition between the trajectory concentration effect and the Delta phi-dependent ionization rate of the tunneling electron. The possibility of controlling over the two-electron emission direction along the 400-nm field through the laser intensity is also investigated. We show that the two-electron emission direction can be reversed by changing the laser intensity for some vales of Delta phi, while this fails for some other values of Delta phi. |
| URI | http://hdl.handle.net/20.500.11897/419182 |
| ISSN | 1050-2947 |
| DOI | 10.1103/PhysRevA.91.063417 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 工学院 |
