Strong-field double ionization at the transition to below the recollision threshold

被引：53

作者：

Ye, D. F. ^{[1
,2
,3
]}

Liu, J. ^{[1
,3
]}

机构：

[1] Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China

[2] China Acad Engn Phys, Grad Sch, Beijing 100088, Peoples R China

[3] Peking Univ, Ctr Appl Phys & Technol, Beijing 100084, Peoples R China

来源：

PHYSICAL REVIEW A | 2010年 / 81卷 / 04期

基金：

中国国家自然科学基金;

关键词：

NONSEQUENTIAL DOUBLE-IONIZATION; MOMENTUM DISTRIBUTIONS; ATOMS; HELIUM; IONS;

D O I：

10.1103/PhysRevA.81.043402

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the strong-field double ionization using a semiclassical model, in which the recollision-induced excitation-tunneling (RIET) effect has been taken into account with the Wentzel-Kramers-Brillouin (WKB) approach. When the laser intensity is below the recollision threshold, we find that both RIET and multiple recollisions become significant and can produce the anticorrelated (back-to-back) electron pair. Distinct footprints left by these two mechanisms on the correlated momentum spectra have been identified. As another signature of the transition to below the recollision threshold regime, we find that the V-shaped (or fingerlike) structure in the correlated momentum spectra fades away. Our model calculations have been compared with a recent experiment on argon atoms.

引用

页数：8

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