Nonadiabatic tunnel ionization: Looking inside a laser cycle

被引：402

作者：

Yudin, GL ^{[1
]}

Ivanov, MY ^{[1
]}

机构：

[1] Natl Res Council Canada, Steacie Inst Mol Sci, Femtosecond Sci Program, Ottawa, ON K1A 0R6, Canada

来源：

PHYSICAL REVIEW A | 2001年 / 64卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.64.013409

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We obtain a simple closed-form analytical expression for ionization rate as a function of instantaneous laser phase phi (t), for arbitrary values of the Keldysh parameter gamma, within the usual strong-field approximation. Our analysis allows us to explicitly distinguish multiphoton and tunneling contributions to the total ionization probability. The range of intermediate gamma similar to1, which is typical for most current intense field experiments, is the regime of nonadiabatic tunneling. In this regime, the instantaneous laser phase dependence differs dramatically from both quasistatic tunneling and multiphoton limits. For cycle-averaged rates, our results reproduce standard Keldysh-Iike expressions.

引用

页数：4

共 28 条

[1]

Ammosov M. V., 1986, Soviet Physics - JETP, V64, P1191

[2] Controlling the phase evolution of few-cycle light pulses [J].