Abstract
We compare the performance of THz dipole antennas fabricated on Multi-energy arsenic-ion-implanted GaAs (multi-GaAs:As <sup>+</sup> ) and Semi-insulating (S. I.) GaAs. High damage threshold biasing (> 60 kV/cm) and large saturating optical pumping power (> 30 mW) for multi-GaAs:As <sup>+</sup> based devices are reported.