Clue to a thorough understanding of terahertz pulse generation by femtosecond laser filamentation

被引：32

作者：

Zhao, Jiayu ^{[1
,2
]}

Liu, Weiwei ^{[2
]}

Li, Shichang ^{[1
]}

Lu, Dan ^{[2
]}

Zhang, Yizhu ^{[3
]}

Peng, Yan ^{[1
]}

Zhu, Yiming ^{[1
]}

Zhuang, Songlin ^{[1
]}

机构：

[1] Univ Shanghai Sci & Technol, Coll Opt & Elect Informat Engn, Shanghai Key Lab Modern Opt Syst, Shanghai 200093, Peoples R China

[2] Nankai Univ, Inst Modern Opt, Key Lab Opt Informat Sci & Technol, Minist Educ, Tianjin 300071, Peoples R China

[3] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China

来源：

PHOTONICS RESEARCH | 2018年 / 6卷 / 04期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

AIR; PLASMA; POLARIZATION; RADIATION; EMISSION; FIELD; PHOTOIONIZATION;

D O I：

10.1364/PRJ.6.000296

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work, it has been demonstrated that in order to fully understand the terahertz (THz) pulse generation process during femtosecond laser filamentation, the interaction between THz wave and air plasma has to be taken into account. This interaction is mainly associated with the spatial confinement of the THz pulse by the plasma column, which could be described by the one-dimensional negative dielectric (1DND) waveguide model. By combining the 1DND model with the conventional four-wave mixing (4WM) and photocurrent (PC) models, the variation of THz spectral amplitude and width obtained in experiments could be better understood. Finally, a three-step procedure, with 1DND bridging 4WM and PC processes, has been established for the first time to describe the underlying mechanism of THz radiation from plasma sources. (c) 2018 Chinese Laser Press

引用

页码：296 / 306

页数：11

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[1] Clue to a thorough understanding of terahertz pulse generation by femtosecond laser filamentation
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[J]. Photonics Research, 2018, (04) : 296 - 306
[2] Clue to a thorough understanding of terahertz pulse generation by femtosecond laser filamentation
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