Optimization of Terahertz Radiation Generation via Sech-Shaped Laser Pulses in Collisional Homogenous Plasma

The influence of the sech-shaped laser pulse and collisional plasma profile on the efficacy of terahertz (THz) production has been thoroughly investigated. The study assesses the impact of the sech parameter (b) on THz production, revealing that an increase in b results in a more focused laser pulse, hence augmenting plasma interaction and raising THz generation efficiency. The examination of transverse distance indicates that increased values of b lead to a more concentrated ideal region for THz production, with peak efficiency relocating to reduced transverse distances. The impact of collisional frequency is analysed, revealing that elevated collisional frequencies diminish THz generating efficiency owing to heightened dispersion and energy dissipation. Moreover, plasma density has a direct correlation with THz production, since elevated density promotes intensified nonlinear interactions and improved efficiency. These findings highlight the need of optimising these parameters for efficient THz production.