Аннтотация

© 2018 IEEE. We study both theoretically and experimentally an ability for shaping the spectra of the terahertz (THz) pulses, emitted by a photoconductive antennas (PCAs) with the logspiral configuration of electrodes, by impedance matching. We select and fabricate 2 configurations of the LT-GaAs PCAs possessing different frequency-dependent impedances and THz spectra. By comparing the results of our studies, we firstly demonstrate high-to-moderate correlation between the frequency-dependent impedance matching efficiency and the THz spectra. The proposed approach makes possible optimizing the PCA performance for accommodating the needs of the THz technology use in various branches, especially in condensed matter and biomedicine.