Nonlinear laser focusing using a conical guide and generation of energetic ions

被引：37

作者：

Cao, Lihua ^{[1
]}

Yu, Wei ^{[2
,3
]}

Yu, M. Y. ^{[3
,4
]}

Xu, Han ^{[5
]}

He, X. T. ^{[1
,3
,6
]}

Gu, Yuqiu ^{[7
]}

Liu, Zhanjun ^{[1
]}

Li, Jinghong ^{[1
]}

Zheng, Chunyang ^{[1
]}

机构：

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

[2] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

[3] Zhejiang Univ, Dept Phys, Inst Fus Theory & Simulat, Hangzhou 310027, Peoples R China

[4] Ruhr Univ Bochum, Inst Theoret Phys 1, D-44780 Bochum, Germany

[5] Natl Univ Def Technol, Inst Comp Sci, Changsha 410073, Hunan, Peoples R China

[6] Peking Univ, Ctr Appl Phys & Technol, Beijing 100871, Peoples R China

[7] China Acad Engn Phys, Laser Fus Res Ctr, Mianyang 621900, Peoples R China

来源：

PHYSICAL REVIEW E | 2008年 / 78卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevE.78.036405

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Using conventional methods, a laser pulse can be focused down to around 6-8 mu m, but further reduction of the spot size has proven to be difficult. Here it is shown by particle-in-cell simulation that with a hollow cone an intense laser pulse can be reduced to a tiny, highly localized, spot of around 1 mu m radius, accompanied by much enhanced light intensity. The pulse shaping and focusing effect is due to a nonlinear laser-plasma interaction on the inner surface of the cone. When a thin foil is attached to the tip of the cone, the cone-focused light pulse compresses and accelerates the ions in its path and can punch through the thin target, creating highly localized energetic ion bunches of high density.

引用

页数：6