Improvement of terahertz photoconductive antennas array using crossfingers structure

The purpose of this research is to improve terahertz photoconductive antenna arrays to enhance their output power. The improved arrays were designed based on crossfingers structure as a high power terahertz generator. The finite difference time domain method was used for modelling and simulating of the generator. The characteristics of the improved array and its emphasis points and key parameters were studied. This structure demonstrated that the terahertz antenna array can generate drastically increased terahertz field amplitudes compared to other structures. The output power of the improved array enhanced as large as 74.1 mu W. The improved array remains in an unsaturated region of operation, whereas the optical pumping with high power level and beam focus was used for its excitation. The improved array enhances the terahertz output power for use in extensive terahertz science and technology applications.