Exact field ionization rates in the barrier-suppression regime from numerical time-dependent Schrodinger-equation calculations

被引：133

作者：

Bauer, D ^{[1
]}

Mulser, P ^{[1
]}

机构：

[1] Tech Univ Darmstadt, D-64289 Darmstadt, Germany

来源：

PHYSICAL REVIEW A | 1999年 / 59卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.59.569

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Numerically determined ionization rates for the field ionization of atomic hydrogen in strong and short laser pulses are presented. The laser pulse intensity reaches the so-called "barrier-suppression ionization" regime where field ionization occurs within a few half laser cycles. Comparison of our numerical results with analytical theories frequently used shows poor agreement. An empirical formula for the "barrier-suppression ionization" rate is presented. This rate reproduces very well the course of the numerically determined groundstate populations for laser pulses with different length, shape, amplitude, and frequency. [S1050-2947(99)04001-9].

引用

页码：569 / 577

页数：9

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