Transformation of terahertz spectra emitted from dual-frequency femtosecond pulse interaction in gases

被引：81

作者：

Borodin, A. V. ^{[1
,2
]}

Panov, N. A. ^{[1
,2
]}

Kosareva, O. G. ^{[1
,2
]}

Andreeva, V. A. ^{[1
,2
]}

Esaulkov, M. N. ^{[1
,2
]}

Makarov, V. A. ^{[1
,2
]}

Shkurinov, A. P. ^{[1
,2
]}

Chin, S. L. ^{[3
,4
]}

Zhang, X. -C. ^{[5
,6
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119923, Russia

[2] Moscow MV Lomonosov State Univ, Ctr Int Laser, Moscow 119923, Russia

[3] Univ Laval, Ctr Dopt Photon & Laser, Quebec City, PQ G1V 0A6, Canada

[4] Univ Laval, Dept Phys, Quebec City, PQ G1V 0A6, Canada

[5] HUST, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

[6] Univ Rochester, Inst Opt, Rochester, NY 14627 USA

来源：

OPTICS LETTERS | 2013年 / 38卷 / 11期

基金：

美国国家科学基金会;

关键词：

AIR; GENERATION; EMISSION;

D O I：

10.1364/OL.38.001906

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate that the two basic physical mechanisms of terahertz (THz) generation in a femtosecond filament, namely, the free electron photocurrent and the nonlinear polarization of neutrals, can be identified through the spectral analysis of THz radiation. The contribution from the photocurrent peaks at the units of THz, while the neutrals yield the peak at the tens of THz. We suggest the practical implementation of such spectral analysis by varying the initial transform-limited laser pulse duration. (C) 2013 Optical Society of America

引用

页码：1906 / 1908

页数：3

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