Broadband terahertz emission from two-color femtosecond-laser-induced microplasmas

被引：14

作者：

Thiele, I. ^{[1
]}

Martinez, P. Gonzalez de Alaiza ^{[1
]}

Nuter, R. ^{[1
]}

Nguyen, A. ^{[2
]}

Berge, L. ^{[2
]}

Skupin, S. ^{[1
,3
]}

机构：

[1] Univ Bordeaux, CNRS, CEA, Ctr Lasers Intenses & Applicat,UMR 5107, F-33405 Talence, France

[2] CEA, DAM Ile De France, F-91297 Bruyeres Le Chatel, Arpajon, France

[3] Univ Lyon 1, CNRS, UMR 5306, Inst Lumiere Matiere, F-69622 Villeurbanne, France

来源：

PHYSICAL REVIEW A | 2017年 / 96卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.96.053814

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate terahertz emission from two-color femtosecond-laser-induced microplasmas. Under the strongest focusing conditions, microplasmas are shown to act as point sources for broadband terahertz-to-far-infrared radiation, where the emission bandwidth is determined by the gas pressure. Semi-analytical modeling allows us to identify scaling laws with respect to the plasma dimensions. We find that the optical-to-THz conversion efficiency depends crucially on the focusing conditions. We use this insight to demonstrate by means of Maxwell-consistent three-dimensional simulations that, for only 10 mu J laser pulse energy a conversion efficiency well above 10(-4) can be achieved.

引用

页数：11

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