YANG Kang1, 2 CHEN Xiliang1, 2 MA Mingwang1, et al. Terahertz photoconductive antenna made of 1.5 MeV He~+-implanted GaAs substrates[J]. Nuclear techniques, 2010, 33(7): 497-500.
YANG Kang1, 2 CHEN Xiliang1, 2 MA Mingwang1, et al. Terahertz photoconductive antenna made of 1.5 MeV He~+-implanted GaAs substrates[J]. Nuclear techniques, 2010, 33(7): 497-500.DOI:
performances of terahertz emitters made of semi-insulating GaAs(SI-GaAs) was improved by 1.5 MeV He+ ion implantation.The time-domain signal strength of the implanted SI-GaAs is about three times higher than that of the non-irradiated sample.The photoconductive antenna(PCA) on a substrate of He+-implanted SI-GaAs possesses slightly higher time-domain signal strength and slightly broader frequency range than those of the PCA on an LT-GaAs substrate
with similar signal-to-noise ratio.The best THz wave emission property can be achieved by implanting the SI-GaAs with 1.5 MeV He+ ions of about 1×1016 cm-2 at room temperature.