Generation of second-harmonic radiations of a self-focusing laser from a plasma with density-transition

被引：36

作者：

Kant, Niti ^{[2
]}

Gupta, Devki Nandan ^{[1
]}

Suk, Hyyong ^{[3
,4
]}

机构：

[1] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India

[2] Lovely Profess Univ, Dept Phys, Phagwara 144402, Punjab, India

[3] Gwangju Inst Sci & Technol, APRI, Kwangju 500712, South Korea

[4] Gwangju Inst Sci & Technol, Grad Program Photon & Appl Phys, Kwangju 500712, South Korea

来源：

PHYSICS LETTERS A | 2011年 / 375卷 / 35期

基金：

新加坡国家研究基金会;

关键词：

Laser-plasma interaction; Harmonic generation; Self-focusing; HARMONIC-GENERATION; UNDERDENSE; LIGHT; PULSE;

D O I：

10.1016/j.physleta.2011.06.062

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A Gaussian laser-beam resonantly generates a second-harmonic wave in a plasma in the presence of a wiggler magnetic-field of suitable period. The self-focusing of the fundamental pulse enhances the intensity of the second-harmonic pulse. An introduction of an upward plasma-density ramp strongly enhances the self-focusing of the fundamental laser pulse. The laser pulse attains a minimum spot size and propagates up to several Rayleigh lengths without divergence. Due to the strong self-focusing of the fundamental laser pulse. the second-harmonic intensity enhances significantly. A considerable enhancement of the intensity of the second-harmonic is observed from the proposed mechanism. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：3134 / 3137

页数：4

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