Ionization dynamics of extended multielectron systems
Ionization dynamics of extended multielectron systems
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扩展多电子系统的电离动力学
DOI：
10.1103/physreva.70.041401
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发表时间：
2004
影响因子：
2.9
通讯作者：
T. Brabec
中科院分区：
文献类型：
--
作者：
M. Kitzler;J. Zanghellini;C. Jungreuthmayer;M. Smits;A. Scrinzi;T. Brabec
利用一维多构型随时间变化的Hartree-Fock计算研究了多电子系统的电离。我们的分析揭示了复杂系统电离的关键物理过程。激光诱导的多电子动力学及其电离过程取决于激光频率（{omega}{sub 0}）与等离子体频率（{omega}{sub p}）的比值。在过谐振极限（{omega}{sub 0}>>{omega}{sub p}）下，隧道电离被破坏，电离通过经典的过势垒机制发生。在低共振区（{omega}{sub 0}<<{omega}{sub p}），隧穿电离仍然占主导地位，但被极化诱导的隧穿势垒的增长所削弱。
Ionization of multielectron systems is investigated by using one-dimensional, multiconfiguration time-dependent Hartree-Fock calculations. Our analysis reveals the key physical processes underlying ionization of complex systems. The laser-induced multielectron dynamics, and therewith the ionization process, depend on the ratio of laser frequency ({omega}{sub 0}) to plasmon frequency ({omega}{sub p}). In the overresonant limit ({omega}{sub 0}>>{omega}{sub p}), tunnel ionization is destroyed and ionization takes place by a classical over the barrier mechanism. In the underresonant regime ({omega}{sub 0}<<{omega}{sub p}), tunnel ionization remains dominant, but is weakened by a polarization-induced growth of the tunneling barrier.