Design of optimum terahertz transient response using finite-difference time-domain (FDTD) method

Summary form only given. The efficient generation of high intensity and high bandwidth terahertz radiation using photoconductive antenna has attracted lots of interest for terahertz imaging. Increasing the static field at the point of optical-pulse illumination between the photoconductive gap has enhanced the intensity of the terahertz radiation. However, the dependency of the radiation bandwidth on the antenna geometry has not been studied yet. In this work, we have investigated the effect of the antenna geometry on the 3 dB-bandwidth and the peak field intensity of the terahertz emitter based on the FDTD method (finite-difference time domain method).