Intense terahertz generation by different frequency of super-Gaussian lasers in presence of transverse magnetic field

We propose a mechanism of high intensity terahertz (THz) radiation generation by photo-mixing of super-Gaussian lasers with frequencies$\omega _{1} $, $\omega_{2} $ and wave numbers $k_{1} ,k_{2} $ (profile index p \textgreater 2) in a corrugated plasma under the effect of static magnetic field $B_{0} \hat{{z}}$. The scheme is based on a strong nonlinear ponderomotive force offered by lasers fields to the plasma electrons at frequency ${\omega }'=\omega_{1} -\omega_{2} $ and wave number ${k}'=k_{1} -k_{2} $. The ponderomotive force offers nonlinear transverse plasma current. This controllable current produces the focused radiation of tunable frequency and power along with a remarkable efficiency of the scheme as $\sim $0.02.