3D Numerical Simulations of THz Generation by Two-Color Laser Filaments

被引：133

作者：

Berge, Luc ^{[1
]}

Skupin, Stefan ^{[2
,3
]}

Koehler, Christian ^{[1
,2
]}

Babushkin, Ihar ^{[4
]}

Herrmann, Joachim ^{[5
]}

机构：

[1] CEA DAM, DIF, F-91297 Arpajon, France

[2] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[3] Univ Jena, Inst Condensed Matter Theory & Opt, D-07743 Jena, Germany

[4] Weierstrass Inst Angew Anal & Stochast, D-10117 Berlin, Germany

[5] Max Born Inst Nichtlineare Opt & Kurzzeitspektros, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 07期

关键词：

PULSE GENERATION; TERAHERTZ; MEDIA; AIR;

D O I：

10.1103/PhysRevLett.110.073901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Terahertz (THz) radiation produced by the filamentation of two-color pulses over long distances in argon is numerically investigated using a comprehensive model in full space-time-resolved geometry. We show that the dominant physical mechanism for THz generation in the filamentation regime at clamping intensity is based on quasi-dc plasma currents. The calculated THz spectra for different pump pulse energies and pulse durations are in agreement with previously reported experimental observations. For the same pulse parameters, near-infrared pump pulses at 2 mu m are shown to generate a more than 1 order of magnitude greater THz yield than pumps centered at 800 nm. DOI: 10.1103/PhysRevLett.110.073901

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页数：5

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