Terahertz modulation induced by filament interaction

被引：21

作者：

He, Boqu ^{[1
]}

Nan, Junyi ^{[1
]}

Li, Min ^{[2
]}

Yuan, Shuai ^{[2
]}

Zeng, Heping ^{[1
,2
]}

机构：

[1] East China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China

[2] Univ Shanghai Sci & Technol, Sch Opt Elect & Comp Engn, Shanghai Key Lab Modern Opt Syst, Engn Res Ctr Opt Instrument & Syst,Minist Educ, Shanghai 200093, Peoples R China

来源：

OPTICS LETTERS | 2017年 / 42卷 / 05期

基金：

中国国家自然科学基金;

关键词：

MOLECULAR-ALIGNMENT; PULSE GENERATION; LASER FILAMENTS; THZ PULSES; AIR; RADIATION; POLARIZATION; EMISSION; ARRAY;

D O I：

10.1364/OL.42.000967

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We experimentally demonstrated that nonlinear filament interaction could spectrally modulate terahertz (THz) radiation generated from asymmetric two-color filaments. It was the spatial plasma density modulation in plasma channels that induced the THz spectral modulation. As a result of optical manipulation of electron density in the filamentary plasma gratings, the proportion of high-frequency THz spectra increased, while that of low-frequency THz spectra decreased, indicating that the increase of free electron density in the filamentary plasma grating brought about THz frequency upshifts. (C) 2017 Optical Society of America

引用

页码：967 / 970

页数：4

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