Enhanced resonant second harmonic generation in plasma based on density transition

Kant, Niti; Thakur, Vishal

doi:10.1515/nuka-2015-0036

Cited by 15 publications

(2 citation statements)

References 27 publications

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“…The self-focusing benefits for right-handed polarisation and the benefits of defocusing for left-handed polarisation are also increased by a decrease in plasma temperature and an increase in the oblique magnetic field [19]. Wani et al [20] reported that semiconductor quantum plasma (SCQP) had enhanced the accuracy of self-focusing. The Hermite cosh gaussian (HchG) beam grants freedom to the decentred parameter, significantly altering the laser beam's ability to focus on its own quip.…”

Section: Introductionmentioning

confidence: 99%

Self-focusing of a q-gaussian laser beam under the influence of an exponential plasma density ramp in plasma

2023

Self Cite

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The goal of the current manuscript is to investigate how a plasma density ramp affects the ability of a q-Gaussian laser beam (q-GLB) to self-focus in plasma. The laser beam exhibits oscillatory self-focusing and defocusing behaviour with increasing distance of propagation. We used an exponential plasma density ramp to combat this defocusing tendency, allowing the particular laser beam to achieve a minimal spot size and nearly retain it up to several Rayleigh lengths. In addition to that, it has been observed that self-focusing increases with increasing q-values and the laser intensity. However, the lower values of q suggest strong self-focusing. By warily selecting the plasma and laser parameters, the density ramp could play a key role in the self-focusing of q-Gaussian laser. Self-focusing is seen to become stronger as propagation distance increases and the q-parameter affects the behaviour of the beam-width parameter in the plasma as shown.

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Section: Introductionmentioning

confidence: 99%

Self-focusing of a q-gaussian laser beam under the influence of an exponential plasma density ramp in plasma

2023

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“…Kumar et al studied the self-focusing of an elliptic-Gaussian laser beam in relativistic ponderomotive plasma using a density ramp profile [15]. Kant and Thakur investigated the enhanced resonant second harmonic generation of a relativistically self-focused laser beam in plasma with density transition (ramp) [16].…”

Section: Introductionmentioning

confidence: 99%

Enhanced second harmonic generation of Hermite–Gaussian laser beam in plasma having density transition

Wadhwa

Singh

2020

Laser Phys.

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Under the combined effect of relativistic and ponderomotive nonlinearity, resonant second harmonic generation of an intense Hermite-Gaussian (H-Gaussian) laser beam in a plasma having upward density ramp profile has been theoretically investigated. Under WKB approximation and with the use of the moment theory approach the coupled differential equations are derived which govern the spot size of the H-Gaussian laser beam. The ponderomotive force creates the density gradient in the background plasma electrons which is responsible for the excitation of the electron plasma wave. The large-amplitude electron plasma wave interacts with the fundamental beam which produces coherent radiations with double the frequency of the incident beam. In addition, the Gouy phase shift is observed for the H-Gaussian laser beam in plasma under the effect of density transition. The analysis shows the vital role of the different modes of the H-Gaussian laser beam and density ramp on the efficiency of generated harmonics and self-phase shift of laser beams in plasma.

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Effect of pulse slippage on density transition-based resonant third-harmonic generation of short-pulse laser in plasma

Thakur

Kant

2016

Front. Phys.

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Enhanced resonant second harmonic generation in plasma based on density transition

Cited by 15 publications

References 27 publications

Self-focusing of a q-gaussian laser beam under the influence of an exponential plasma density ramp in plasma

Self-focusing of a q-gaussian laser beam under the influence of an exponential plasma density ramp in plasma

Enhanced second harmonic generation of Hermite–Gaussian laser beam in plasma having density transition

Effect of pulse slippage on density transition-based resonant third-harmonic generation of short-pulse laser in plasma

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