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Electron correlations in nonsequential double ionization of argon atoms by elliptically polarized laser pulses

Chinese Physics B 2013年第1期22卷 191-196页

作者：余本海李盈傧汤清彬 College of Physics and Electronic Engineering Xinyang Normal University

Using a classical ensemble model, we investigate the correlation behaviour of electrons originating from nonsequential double ionization （NSDI） of argon atoms by the elliptically polarized laser pulses. Because of the ellipticity, not only the first electron to return but also the later return of tunneled electrons contribute significantly to NSDI. We mainly discuss two kinds of events of NSDI originating from the first and the second return separately. For the NSDI resulting from the recollision of the first return, the correlated electron momentum spectrum along the long axis of the laser polarization plane reveals an obvious V-like shape, located at the first and third quadrant. However, for the NSDI resulting from the recollision of the second return, the momenta of two electrons are distributed in the four quadrants uniformly. By analysing the trajectories of these two kinds, we find that the recollision energy and the laser phase at recollision are different for the first and second returning trajectories, which are responsible for the difference in the correlated behavior of the final electron momentum.

关键词： nonsequential double ionization elliptically polarized laser pulse recollision electron correlation

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Electron dynamics of molecular frustrated double ionization driven by strong laser fields

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Communications in Theoretical Physics 2023年第3期75卷 114-122页

作者：汤清彬史璐珂张可康帅杰李整法吴银梦秦玲玲翟春洋刘爱华李盈傧余本海 College of Physics and Electronic Engineering Xinyang Normal UniversityXinyang 464000China State Key Laboratory of Transient Optics and Photonics Chinese Academy of SciencesXi'an 710119China Institute of atomic and molecular physics Jilin UniversityChangchun 130012China

We theoretically investigate the frustrated double ionization(FDI)of molecules with different alignment-dependence using a three-dimensional classical ensemble *** numerical results show that the FDI probability decreases with increasing wavelength,which is similar to the wavelength dependence of the FDI probability of *** the classical trajectories reveals that the contributions to molecular FDI from single-recollision and multiple-recollision mechanisms are equal in the short wavelength *** the long wavelength regime,the single-recollision FDI channel dominates in *** nature in which molecular FDI occurs is identified and explained.

关键词： nonsequential double ionization frustrated double ionization recollision

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Microscopic Dynamics of Nonsequential Double Ionization by Elliptically Polarized Few-Cycle Laser Pulses

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Communications in Theoretical Physics 2013年第6期59卷 714-718页

作者：余本海李盈傧李方涛 College of Physics and Electronic Engineering Xinyang Normal University

With the classical ensemble model, we investigate nonsequential double ionization （NSDI） of xenon atoms using 780 nm, 0.25 PW/cm2 elliptically polarized few-cycle laser pulses. The momentum distribution of correlated electron along the long axis o~ the laser polarization plane shows an obvious V-like structure locating at the third quadrant, and the momentum along the short axis of the laser polarization plane are mainly distributed in the second and fourth quadrants. Moreover, we demonstrate that the Coulomb repulsion interaction plays a decisive role to the above results. By back analyzing the class/ca/ trajectories of NSDI, we find that there are two kinds of recollision trajectories mainly contribute to NSDI, and the different microscopic dynamics for the two kinds of trajectories are clearly explored.

关键词： rnonsequential double ionization elliptically few-cycle laser pulse recollision time delay

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