Theoretical Study of Field Intensity of THz Radiation fromGaAs Large-Aperture Photoconductive Antennas

Abstract

We simulate the THz radiation's time domain waveforms of both thenear field and the far field of a GaAs large aperture photoconductiveantenna based on the current surge model. Because the micro-kineticfactors, such as transient state changes of current carrier's mobility andlifetime of current carriers, are taken into account in the calculation,we find out the influences of these factors on the THz radiationintensity by changing the above parameters. The results are of guidingsignificance to design of high-power photoconductive THz radiationantenna materials.