Generation of terahertz radiation via cosh-Gaussian and top-hat laser beams in a collisional magnetized plasma

2018 ◽  
Vol 58 (9) ◽  
pp. 904-916
Author(s):  
Ayoob Hematizadeh ◽  
Masud Jazayeri ◽  
Bijan Ghafary
Keyword(s):  
Terahertz Radiation ◽  
Magnetized Plasma ◽  
Laser Beams

Terahertz Radiation Generation by Frequency Mixing of Hermite–Cosh–Gaussian Laser Beams in Density-Modulated Cold Magnetized Plasma

2021 ◽  
Vol 49 (9) ◽  
pp. 3022-3028
Author(s):  
Anil K. Malik ◽  
Kunwar Pal Singh ◽  
Manendra ◽  
Beer Pal Singh ◽  
Sheetal Chaudhary ◽  
...  
Keyword(s):  
Terahertz Radiation ◽  
Magnetized Plasma ◽  
Laser Beams ◽  
Radiation Generation ◽  
Frequency Mixing

Terahertz radiation generation by pulse slippage of Cosh-Gaussian lasers in a corrugated magnetized plasma

2017 ◽  
Vol 24 (12) ◽  
pp. 123117 ◽  
Author(s):  
Kusum Lata Mann ◽  
Vivek Sajal ◽  
Prateek Varshney ◽  
Navneet K. Sharma
Keyword(s):  
Terahertz Radiation ◽  
Magnetized Plasma ◽  
Radiation Generation

Tunable and efficient terahertz radiation generation by photomixing of two super Gaussian laser pulses in a corrugated magnetized plasma

2015 ◽  
Vol 117 (19) ◽  
pp. 193303 ◽  
Author(s):  
Prateek Varshney ◽  
Vivek Sajal ◽  
Kunwar Pal Singh ◽  
Ravindra Kumar ◽  
Navneet K. Sharma
Keyword(s):  
Terahertz Radiation ◽  
Laser Pulses ◽  
Magnetized Plasma ◽  
Radiation Generation

scholarly journals Generation of terahertz radiation in collisional plasma by beating of two dark hollow laser beams

2015 ◽  
Vol 33 (3) ◽  
pp. 463-472 ◽  
Author(s):  
Farhad Bakhtiari ◽  
Shole Golmohammady ◽  
Masoud Yousefi ◽  
Fatemeh D. Kashani ◽  
Bijan Ghafary
Keyword(s):  
Terahertz Radiation ◽  
Laser Beams ◽  
Intensity Gradient ◽  
Plasma Parameters ◽  
Highly Sensitive ◽  
Radiation Generation ◽  
Spatially Periodic ◽  
Special Distribution ◽  
Hollow Laser Beam ◽  
Beating Frequency

AbstractThis paper presents a scheme of terahertz radiation generation based on beating of two dark hollow laser beams with different frequencies, the same electric field amplitudes, in actual plasma with spatially periodic density that electron–neutral collisions have taken into account. The main feature of considered hollow laser beams is, having the same power at different beam orders. Because of special distribution in beam intensity gradient in dark hollow laser beam, the produced terahertz radiation has special field profile. The effects of laser and plasma parameters on terahertz radiation generation are investigated analytically. It can be deduced that by increasing beating frequency, efficiency of terahertz generation decreases which can be compensated by manipulating density ripple magnitudes and dark-size adjusting parameter. The intensity of the emitted radiations is found to be highly sensitive to the beam order. Based on the results of this paper, optimization of laser and plasma parameters can increase the efficiency of terahertz radiation generation strongly.

scholarly journals On the exploration of graphical and analytical investigation of effect of critical beam power on self-focusing of cosh-Gaussian laser beams in collisionless magnetized plasma

2018 ◽  
Vol 36 (2) ◽  
pp. 254-260 ◽  
Author(s):  
T. U. Urunkar ◽  
S. D. Patil ◽  
A. T. Valkunde ◽  
B. D. Vhanmore ◽  
K. M. Gavade ◽  
...  
Keyword(s):  
Differential Equation ◽  
Turning Points ◽  
Beam Width ◽  
Analytical Investigation ◽  
Graphical Analysis ◽  
Magnetized Plasma ◽  
Laser Beams ◽  
Beam Power ◽  
Equation Approach ◽  
Self Focusing

AbstractThe paper gives graphical and analytical investigation of the effect of critical beam power on self-focusing of cosh-Gaussian laser beams in collisionless magnetized plasma under ponderomotive non-linearity. The standard Akhmanov's parabolic equation approach under Wentzel–Kramers–Brillouin (WKB) and paraxial approximations is employed to investigate the propagation of cosh-Gaussian laser beams in collisionless magnetized plasma. Especially, the concept of numerical intervals and turning points of critical beam power has evolved through graphical analysis of beam-width parameter differential equation of cosh-Gaussian laser beams. The results are discussed in the light of numerical intervals and turning points.

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