Enhanced absorption of intense short-pulse laser light by subwavelength nanolayered target

被引：68

作者：

Cao, Lihua ^{[1
]}

Gu, Yuqiu ^{[2
]}

Zhao, Zongqing ^{[2
]}

Cao, Leifeng ^{[2
]}

Huang, Wenzhong ^{[2
]}

Zhou, Weimin ^{[2
]}

He, X. T. ^{[1
,3
,4
]}

Yu, Wei ^{[4
,5
]}

Yu, M. Y. ^{[4
,6
]}

机构：

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

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

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

[4] Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310027, Zhejiang, Peoples R China

[5] Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

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

来源：

PHYSICS OF PLASMAS | 2010年 / 17卷 / 04期

关键词：

light absorption; nanostructured materials; plasma heating by laser; plasma light propagation; plasma simulation; PLASMA; GENERATION; DENSITY;

D O I：

10.1063/1.3360298

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：

Two-dimensional particle-in-cell simulation shows that a target with subwavelength nanolayered front can reduce the reflection and increase the absorption of the energy of an intense short laser pulse. The electrons within the skin depth on the surfaces of the nanolayers are accelerated by JxB heating to relativistic velocities and ejected into the narrow vacuum spaces between the layers. They then propagate forward with most of the absorbed laser energy along the surfaces of the layers. Conversion of the laser energy into electron energy can be enhanced by optimizing the vacuum spacing between the nanolayers since the phase structure of the laser field in the target is modified. The effects of the layer width, length, and spacing on the energy conversion efficiency are investigated.

引用

页数：6

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