Powered Multifocal THz Radiation by Mixing of Two Skew (ChG) Cosh-Gaussian Laser Beams in Collisional Plasma

TL;DR

This paper investigates how beating two skew Cosh-Gaussian lasers in collisional plasma generates stronger, multifocal THz radiation, with detailed analysis of collision effects and beam width influence.

Contribution

It introduces the use of skew Cosh-Gaussian lasers for enhanced THz generation in plasma, highlighting their advantages over Gaussian lasers.

Findings

Skew ChG lasers produce stronger THz fields than Gaussian lasers.

Collision and beam width reduce THz field amplitude but not efficiency.

Skew ChG lasers enable multifocal THz radiation.

Abstract

Considering a realistic situation, where electron-neutral collisions persist in plasma, analytical calculations are carried out for the THz radiation generation by beating of two Skew Cosh-Gaussian (SG) lasers of parameters n & s. The competency of these lasers over Gaussian lasers is discussed in detail with respect to the effects of collision and beam width on the THz field amplitude and efficiency of the mechanism. A critical transverse distance of the peak of the THz field is defined that shows a dependence on the skewness parameter of skew ChG lasers. Although electron-neutral collisions and larger beam width lead to the drastic reduction in the THz field when the skew ChG lasers are used in the plasma, the efficiency of the mechanism remains much larger than the case of Gaussian lasers. Moreover, the skewChG lasers produce stronger and multifocal THz radiation.