Above-threshold ionization with highly charged ions in superstrong laser fields. II. Relativistic Coulomb-corrected strong-field approximation
Above-threshold ionization with highly charged ions in superstrong laser fields. II. Relativistic Coulomb-corrected strong-field approximation
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DOI：
10.1103/physreva.87.023418
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发表时间：
2013-01
影响因子：
2.9
通讯作者：
M. Klaiber;E. Yakaboylu;K. Hatsagortsyan
中科院分区：
文献类型：
--
作者：
M. Klaiber;E. Yakaboylu;K. Hatsagortsyan
针对强激光场中高电荷态离子阈上电离的研究，发展了库仑修正的强场近似。通过程函近似，将库仑势微扰地处理在连续介质电子的准经典波函数的相位上，考虑了原子核的库仑势对连续介质中电离电子动力学的影响.本文利用速度规范和长度规范讨论了非相对论区域的库仑修正SFA的形式.研究了强线偏振激光场中类氢体系的直接电离。本文讨论了不同规范下的结果与Perelomov-Popov-Terent的常时方法的关系。
Aiming at the investigation of above-threshold ionization in super-strong laser fields with highly charged ions, we develop a Coulomb-corrected strong field approximation (SFA). The influence of the Coulomb potential of the atomic core on the ionized electron dynamics in the continuum is taken into account via the eikonal approximation, treating the Coulomb potential perturbatively in the phase of the quasi-classical wave function of the continuum electron. In this paper the formalism of the Coulomb-corrected SFA for the nonrelativistic regime is discussed employing velocity and length gauge. Direct ionization of a hydrogen-like system in a strong linearly polarized laser field is considered. The relation of the results in the different gauges to the Perelomov-Popov-Terent'ev imaginary-time method is discussed.