Research on superluminal propagation of terahertz wave during femtosecond laser filamentation

Weiwei Liu; Jiayu Zhao; Yizhu Zhang; Zhi Wang; Wei Chu; Bin Zeng; Ya Cheng

doi:10.3788/IRLA201645.0402001

Research on superluminal propagation of terahertz wave during femtosecond laser filamentation

Weiwei Liu
, Jiayu Zhao
, Yizhu Zhang
, Zhi Wang
, Wei Chu
, Bin Zeng
, Ya Cheng

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

In this paper, by investigating the terahertz (THz) waveforms emitted from different lengths of filaments via THz time-domain spectroscopy system (THz-TDS), superluminal propagation of THz wave during filamentation was observed. It implies that the refractive index of the THz wave is smaller than the unity within the filament region, and thus the THz pulse may propagate inside the filament. This hypothesis is supported by further numerical simulation, which demonstrates THz eigenmode inside the plasma filament.

Original language	English
Article number	0402001
Journal	Infrared and Laser Engineering
Volume	45
Issue number	4
DOIs	https://doi.org/10.3788/IRLA201645.0402001
State	Published - 25 Apr 2016
Externally published	Yes

Keywords

Eigenmode
Femtosecond laser
Filamentation
Superluminal propagation
Terahertz wave

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10.3788/IRLA201645.0402001

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title = "Research on superluminal propagation of terahertz wave during femtosecond laser filamentation",

abstract = "In this paper, by investigating the terahertz (THz) waveforms emitted from different lengths of filaments via THz time-domain spectroscopy system (THz-TDS), superluminal propagation of THz wave during filamentation was observed. It implies that the refractive index of the THz wave is smaller than the unity within the filament region, and thus the THz pulse may propagate inside the filament. This hypothesis is supported by further numerical simulation, which demonstrates THz eigenmode inside the plasma filament.",

keywords = "Eigenmode, Femtosecond laser, Filamentation, Superluminal propagation, Terahertz wave",

author = "Weiwei Liu and Jiayu Zhao and Yizhu Zhang and Zhi Wang and Wei Chu and Bin Zeng and Ya Cheng",

year = "2016",

month = apr,

day = "25",

doi = "10.3788/IRLA201645.0402001",

language = "英语",

volume = "45",

journal = "Infrared and Laser Engineering",

issn = "1007-2276",

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TY - JOUR

T1 - Research on superluminal propagation of terahertz wave during femtosecond laser filamentation

AU - Liu, Weiwei

AU - Zhao, Jiayu

AU - Zhang, Yizhu

AU - Wang, Zhi

AU - Chu, Wei

AU - Zeng, Bin

AU - Cheng, Ya

PY - 2016/4/25

Y1 - 2016/4/25

N2 - In this paper, by investigating the terahertz (THz) waveforms emitted from different lengths of filaments via THz time-domain spectroscopy system (THz-TDS), superluminal propagation of THz wave during filamentation was observed. It implies that the refractive index of the THz wave is smaller than the unity within the filament region, and thus the THz pulse may propagate inside the filament. This hypothesis is supported by further numerical simulation, which demonstrates THz eigenmode inside the plasma filament.

AB - In this paper, by investigating the terahertz (THz) waveforms emitted from different lengths of filaments via THz time-domain spectroscopy system (THz-TDS), superluminal propagation of THz wave during filamentation was observed. It implies that the refractive index of the THz wave is smaller than the unity within the filament region, and thus the THz pulse may propagate inside the filament. This hypothesis is supported by further numerical simulation, which demonstrates THz eigenmode inside the plasma filament.

KW - Eigenmode

KW - Femtosecond laser

KW - Filamentation

KW - Superluminal propagation

KW - Terahertz wave

UR - https://www.scopus.com/pages/publications/84971367722

U2 - 10.3788/IRLA201645.0402001

DO - 10.3788/IRLA201645.0402001

M3 - 文章

AN - SCOPUS:84971367722

SN - 1007-2276

VL - 45

JO - Infrared and Laser Engineering

JF - Infrared and Laser Engineering

IS - 4

M1 - 0402001

ER -

Research on superluminal propagation of terahertz wave during femtosecond laser filamentation

Abstract

Keywords

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