Effect of pulse enhancement on beat wave THz generation in a ripple density magnetized plasma

Generation of terahertz pulse by the method of nonlinear mixing of two lasers in a plasma which is magnetized and have ripple density is studied permitting the effect of pulse enhancement. Due to nonlinear ponderomotive force, coupling of electron flow with density ripples occurs which leads to production of nonlinear current. Terahertz radiation are resonantly driven by this nonlinear current at beat frequency. Since here magnetic field is transverse to propagation of laser so we have transverse component of current density, while density ripples are responsible for phase matching. Thus, enhancement of pulse occurs due to the mismatch in group velocity of laser pulses and terahertz radiation, which further results in saturation of amplitude of terahertz waves.