Ultra-short pulse for plasma induced THz generation using carbon nano tubes

Abstract

In the present investigation, a high intense ultra-short pulse configuration has been proposed for plasma induced THz generation in carbon nano tubes. When a high intense ultra-short electromagnetic wave interacts with the periodically structured carbon nano tubes possessing second order susceptibility, the electromagnetic wave imparts oscillatory velocities to electrons that produce the heat. The generation of excess heat may deform the structure of the carbon nano tubes which lead to the reduction in the efficiency of THz generation. Therefore, the pulse parameters evolution such as normalized energy of the pulse, pulse width, position of the pulse center and reflectivity coefficient of the medium is investigated theoretically on plasma generation. The outcome of the theoretically investigated reveals that the increment in the heating rate can be caused by decrease in the pulse width, increment in reflectivity coefficient and the pulse peak power. Finally, an array of ultra-short pulse configurations has been proposed for efficient THz generation. The present work is helpful to regulate the heating of nanostructure during ultra-short pulse interaction.