Terahertz radiation from multi ion plasma irradiated by two cross focused Gaussian laser beams

Jafari, M. J.; Milani, M. R. Jafari; Rezaei, Somayeh

doi:10.1063/1.5115248

Cited by 8 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The external dc magnetic field used to increase the field of emitted radiations [59]. Jafari et al have investigated that the generation of THz radiation by nonlinear coupling of two color laser beam which have Gaussian field in a plasma with multi-ion species through ponderomotive force on laser in plasma [60]. The radiated THz emission strongly depends on the density of ionic species.…”

Section: Beat Wave Schemesmentioning

confidence: 99%

Studies of Terahertz Sources and Their Applications

Singh¹,

Meena²,

Tyagi³

et al. 2022

Intelligent Electronics and Circuits - Terahertz, ITS, and Beyond

View full text Add to dashboard Cite

The contributed chapter discuss the applications of terahertz radiations and its generation mechanism through laser plasma interactions. The methods of generation of terahertz radiations from plasma wake field acceleration, higher harmonic generation and the laser beat wave plasma frequency are reviewed. The nonlinear current density oscillate the plasma at beat wave frequency under the effect of ponderomotive force and excite the terahertz radiation at beat wave frequency. The current state of the arts of the methods of generation has been incorporated. The mathematical expression of ponderomotive force has been derived under the influence of gradient of laser fields. In additions, the future challenge and their overcomes are also been discussed.

show abstract

Section: Beat Wave Schemesmentioning

confidence: 99%

Studies of Terahertz Sources and Their Applications

Singh¹,

Meena²,

Tyagi³

et al. 2022

Intelligent Electronics and Circuits - Terahertz, ITS, and Beyond

View full text Add to dashboard Cite

show abstract

“…The space-charge field (SCF) [1][2][3][4][5][6] is an important physical factor in electronic vacuum devices, particle accelerators [7][8][9][10][11][12], free electron lasers (FEL) [13] and plasma systems [14][15][16][17][18]. It is generated by electrostatic interaction between charged particles.…”

Section: Introductionmentioning

confidence: 99%

Improved Algorithms for Calculating the Space-Charge Field in Vacuum Devices

Luo

Zhang

et al. 2022

Electronics

View full text Add to dashboard Cite

The space-charge field (SCF) is a key factor in vacuum electronic devices, accelerators, free electron lasers and plasma systems, etc. The calculation of the SCF is very important since it has a great influence on the precision of numerical simulation results. However, calculating the SCF usually takes a lot of time, especially when the number of simulated particles is large. In this paper, we used a vectorization, parallelization and truncation method to optimize the calculation of the SCF based on the traditional calculation algorithms. To verify the validity of the optimized SCF calculation algorithm, it was applied in the performance simulation of a millimeter wave traveling wave tube. The results showed that the time cost was reduced by three orders compared with conventional treatment. The proposed algorithm also has great potential applications in free electron lasers, accelerators and plasma systems.

show abstract

“…Therefore, many attempts have been made to relate THz generation to the nonlinear laser-plasma interactions [18][19][20][21]. The generation of THz radiation from laser-induced filaments has been studied by means of numerical methods [22][23][24][25][26][27][28][29][30]. Recently, in a theoretical study carried out by Kumar et al [31], a significant enhancement in THz amplitude was reported due to the self-focusing of an amplitude-modulated Gaussian laser pulse propagated in a rippled plasma.…”

Section: Introductionmentioning

confidence: 99%

“…Further, in order to get close to the real conditions of plasma, Misra et al [35] took into account a multi-ionized plasma with two different species and investigated the self-focusing using an analytical model. The effects of the space-charge field due to the density change of ionic species and also the charge composition on the beam dynamics of lasers and subsequently THz treatment in a multi-ionized plasma were also studied in an another work by Jafari et al [27]. So far, different aspects of the initial parameters' effect on THz yield have been investigated; however, there still exist unknowns relevant to plasma-based THz wave generation, which should be thoroughly analyzed for experimental applications.…”

Section: Introductionmentioning

confidence: 99%

Cross-focusing of two chirped Gaussian laser beams and THz wave generation in plasmas of multi-ion species under a weakly relativistic and ponderomotive regime

Milani¹,

Rezaei²,

Jafari³

2022

Plasma Sci. Technol.

View full text Add to dashboard Cite

The generation of terahertz (THz) wave by beating of two high intensity chirped Gaussian lasers in a multi ion species plasma is numerically studied by taking into account the weak relativistic and ponderomotive regime of interaction. The coupled differential equations for beamwidth parameters are extracted by introducing dielectric function of such plasma and using WKB and paraxial ray approximations. Amplitude of THz radiation at beat frequency resultant from the nonlinear current density induced by beat ponderomotive force of cross-focusing of beams was obtained. The impacts of chirp frequency parameter, initial laser intensity and initial ionic species density (specifically, presence of singly and doubly charged ions) in the plasma on THz generation were discussed. Our numerical results reveal that THz radiation generation strongly depends on the chirp frequency parameter. A specific range of chirp frequencies exists for self-focusing as well as THz generation with \textquotedblleft turning point\textquotedblright where the THz emission reaches its maximum value. The results show that the strength of self-focusing and consequently the generated THz radiation get reduced by increasing the density of doubly charged ionic species in the plasma due to the suppression of the nonlinear effects.

show abstract

Terahertz radiation from multi ion plasma irradiated by two cross focused Gaussian laser beams

Cited by 8 publications

References 29 publications

Studies of Terahertz Sources and Their Applications

Studies of Terahertz Sources and Their Applications

Improved Algorithms for Calculating the Space-Charge Field in Vacuum Devices

Cross-focusing of two chirped Gaussian laser beams and THz wave generation in plasmas of multi-ion species under a weakly relativistic and ponderomotive regime

Contact Info

Product

Resources

About