Distributed Excitations of Pulsed Photo-Conductive Sources: The Time Domain Analysis

Distributed feeding in photo-conducting antennas (PCAs) leads to simple optical designs, less prone to overheating, as well to terahertz (THz) antennas that can operate non-dispersively over wide bandwidths. However, the efficient analysis of pulsed PCAs was so far limited to architectures characterized by feeds small with respect to the THz...

Time Domain Modeling of Photoconductive Antennas

Photoconductive antennas (PCAs) have been extensively utilized for the generation of broadband pulses over very large bandwidths. PCAs rely on a semiconductor (e.g. LT- GaAs) gap pumped by a laser and coupled to a passive structure biased at a certain voltage level. When the laser impinges on the semiconductor gap with an appropriate carrier...

Analysis and Design of Pulsed Photoconductive Antennas

Photoconductive antennas (PCA) are widely used in contemporary THz systems, especially in terahertz time-domain spectroscopy. They are used to radiate and receive THz power. The study of the generation and reception of THz radiation involves both semiconductor theory, electromagnetics, and antenna theory. In this work, after a review of some...