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Efficient Terahertz Generation Using Radially Polarized Hermite–Sinh–Gaussian Pulses in Rippled Plasma
Jasveer Singh, Hitesh Kumar Midha, Vivek Sharma and Vishal Thakur
The efficiency of terahertz (THz) radiation generation is investigated in the context of Hermite-Sinh-Gaussian laser pulse propagating through a rippled plasma medium. A systematic analysis is conducted on the impact of essential physical parameters, such as the Hermite mode index, rippled plasma density parameter, collisional frequency, decentred parameter, and the density of plasma electrons, on THz conversion efficiency. The results show that raising the Hermite mode index makes things more efficient because the laser field becomes more spatially complex. A higher rippled density parameter also makes things more efficient by making the laser-plasma coupling stronger. Higher collisional frequencies, on the other hand, lower efficiency because they cause more energy to be lost and electrons to lose their coherence. Also, a higher value for the decentred parameter makes THz emission stronger, while a lower value makes it weaker. In the range studied, higher plasma density makes coupling efficiency and energy conversion even better, which leads to stronger THz radiation.
Keywords: THz generation efficiency, Hermite-Sinh-Gaussian Pulse, mode index, rippled plasma density, collisional frequency, decentred parameter, nonlinear interaction