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

被引：0

作者：

JIAYU ZHAO ^{[1
,2
]}

WEIWEI LIU ^{[2
]}

SHICHANG LI ^{[1
]}

DAN LU ^{[2
]}

YIZHU ZHANG ^{[3
]}

YAN PENG ^{[1
]}

YIMING ZHU ^{[1
]}

SONGLIN ZHUANG ^{[1
]}

机构：

[1] Shanghai Key Laboratory of Modern Optical Systems, College of Optics and Electronic Information Engineering, University of Shanghai for Science and Technology

[2] Institute of Modern Optics, Key Laboratory of Optical Information Science and Technology, Ministry of Education, Nankai University

[3] Shanghai Advanced Research Institute, Chinese Academy of Sciences

来源：

Photonics Research | 2018年 / 04期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

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

D O I：

暂无

中图分类号：

TN24 [激光技术、微波激射技术];

学科分类号：

0803 ; 080401 ; 080901 ;

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 1 DND 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.

引用

页码：296 / 306

页数：11

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