Laser-Driven Nanoplasmas in Doped Helium Droplets: Local Ignition and Anisotropic Growth

被引：36

作者：

Mikaberidze, Alexey ^{[1
]}

Saalmann, Ulf ^{[1
]}

Rost, Jan M. ^{[1
]}

机构：

[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 12期

关键词：

CLUSTER; PULSES; DYNAMICS;

D O I：

10.1103/PhysRevLett.102.128102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Doping a helium nanodroplet with only a tiny xenon cluster of a few atoms sparks complete ionization of the droplet at laser intensities below the ionization threshold of helium atoms. As a result, the intrinsically inert and transparent droplet turns into a fast and strong absorber of infrared light. Microscopic calculations reveal a two-step mechanism to be responsible for the dramatic change: Avalanchelike ionization of the helium atoms on a femtosecond time scale, driven by field ionization due to the quickly charged xenon core, is followed by resonant absorption enabled by an unusual cigar-shaped nanoplasma within the droplet.

引用

页数：4

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