Transmission characteristics of electromagnetic waves in a semicircular plasma filament layer generated by a femtosecond laser

2021 ◽  
Author(s):  
In‐Ho Pak ◽  
Yong‐Ho Kim ◽  
Chung‐Hyok Oh ◽  
Jun Kim ◽  
Su‐Il Han ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Electromagnetic Waves ◽  
Transmission Characteristics ◽  
Plasma Filament

Experimental study of the effects of femtosecond laser power on the induced-plasma geometry, supercontinuum white light generation and conical emission in air

2020 ◽  
Vol 34 (14) ◽  
pp. 2050152
Author(s):  
A. I. Sanny ◽  
W. M. Edmund Loh
Keyword(s):  
Femtosecond Laser ◽  
White Light ◽  
Laser Power ◽  
Forward Direction ◽  
Geometrical Shape ◽  
Laser Induced Plasma ◽  
Plasma Filament ◽  
White Light Generation ◽  
Conical Emission ◽  
Light Generation

This paper presents the experimental investigation of the changes in the geometrical shape of femtosecond laser-induced plasma in air under different laser power, and its effects on supercontinuum white light generation and conical emission. When a femtosecond laser is focused into a tiny spot in air, optical breakdown of air molecules occurs and this leads to the generation of plasma filament whose geometrical size and shape depend on laser power. This process is then followed by two light-emitting processes, namely supercontinuum white light generation and conical emission, both of which scatter light that reveals the characteristics of the plasma filament. Our experiment shows that the laser-induced plasma becomes thinner and longer at high average laser power but appears thick and round at lower laser power. At higher laser power, conical emission which scatters laser light in the forward direction dominates the scattering process while at lower laser power, it is the scattering of supercontinuum white light in all directions that plays a bigger role. The intricate rainbow-like pattern formed on a white screen located far away in the forward direction reveals sophisticated nonlinear optical processes that take place in conical emission which slowly diminishes as the laser power is gradually reduced.

Hard X-ray generation and plasma filament formation under interaction of femtosecond laser pulses with large molecular clusters

2013 ◽  
Vol 67 (3) ◽  
Author(s):  
Vyacheslav M. Gordienko ◽  
Murat S. Dzhidzhoev ◽  
Irina A. Zhvaniya ◽  
Viktor T. Platonenko ◽  
Dmitriy N. Trubnikov ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Molecular Clusters ◽  
Femtosecond Laser Pulses ◽  
Filament Formation ◽  
X Ray ◽  
Plasma Filament

Anomalous broadening and shift of emission lines in a femtosecond laser plasma filament in air

2017 ◽  
Vol 138 ◽  
pp. 97-105 ◽  
Author(s):  
A.A. Ilyin ◽  
S.S. Golik ◽  
K.A. Shmirko ◽  
A.Yu. Mayor ◽  
D.Yu. Proschenko
Keyword(s):  
Femtosecond Laser ◽  
Laser Plasma ◽  
Emission Lines ◽  
Plasma Filament ◽  
Femtosecond Laser Plasma

Temporal evolution of femtosecond laser induced plasma filament in air and N2

2013 ◽  
Vol 103 (24) ◽  
pp. 244102 ◽  
Author(s):  
J. Papeer ◽  
D. Gordon ◽  
P. Sprangle ◽  
M. Botton ◽  
A. Zigler
Keyword(s):  
Femtosecond Laser ◽  
Temporal Evolution ◽  
Laser Induced Plasma ◽  
Plasma Filament

Longitudinal terahertz wave generation from an air plasma filament induced by a femtosecond laser

2013 ◽  
Vol 102 (15) ◽  
pp. 151106 ◽  
Author(s):  
Yasuo Minami ◽  
Takayuki Kurihara ◽  
Keita Yamaguchi ◽  
Makoto Nakajima ◽  
Tohru Suemoto
Keyword(s):  
Femtosecond Laser ◽  
Terahertz Wave ◽  
Wave Generation ◽  
Air Plasma ◽  
Plasma Filament

scholarly journals Experimental and analytical evaluation of the acoustic radiation of femtosecond laser plasma filament sound sources in air

2019 ◽  
Vol 146 (3) ◽  
pp. EL212-EL218
Author(s):  
Konstantinos Kaleris ◽  
Yannis Orfanos ◽  
Makis Bakarezos ◽  
Nektarios Papadogiannis ◽  
John Mourjopoulos
Keyword(s):  
Femtosecond Laser ◽  
Laser Plasma ◽  
Acoustic Radiation ◽  
Analytical Evaluation ◽  
Sound Sources ◽  
Plasma Filament ◽  
Femtosecond Laser Plasma
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