Single-cycle strong terahertz pulse generation from a vacuum-plasma interface driven by intense laser pulses

被引：26

作者：

Dong, X. G. ^{[1
]}

Sheng, Z. M. ^{[1
,2
]}

Wu, H. C. ^{[3
]}

Wang, W. M. ^{[1
]}

Zhang, J. ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China

[3] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW E | 2009年 / 79卷 / 04期

基金：

中国国家自然科学基金;

关键词：

numerical analysis; plasma light propagation; plasma nonlinear processes; plasma simulation; RADIATION;

D O I：

10.1103/PhysRevE.79.046411

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：

Single-cycle strong terahertz pulses can be generated by irradiating ultrashort intense laser pulses onto a tenuous plasma slab. At the plasma surface, laser ponderomotive force accelerates electrons and induces net currents, which radiate terahertz pulses. Our theoretical model suggests that if tau(L)>2 pi/omega(p), with tau(L) as the laser-pulse duration and omega(p) as the plasma frequency, the emission frequency is around tau(-1)(L). On the other hand, the emission frequency is around omega(p)/2 pi if tau(L)< 2 pi/omega(p). Our numerical simulations support the theoretical model, showing that such a terahertz source is capable of providing megawatt power, field strengths of MV/cm, and broad frequency tunability.

引用

页数：6

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