Enhancement of terahertz emission in magnetized collisional plasma

We carry out analytical calculations for the electric field amplitude and efficiency of the mechanism of terahertz (THz) radiation generated due to interaction of super-Gaussian lasers with collisional plasma. The contribution of magnetic field and the role of index of lasers for enhancing the field amplitude are uncovered under the effect of laser beam width and collision frequency between electrons and neutrals. Terahertz radiation with larger electric field is realized when lasers of higher index and lower beam widths interact with the plasma in the presence of an external static magnetic field. Under optimized parameters, THz field amplitude of about 10⁷ kV m⁻¹ and 6% efficiency of the mechanism can be realized using the lasers with field 5.0   ×   10¹⁰ V m⁻¹. (paper)