YANG Kang MA Mingwang CHEN Xiliang ZHU Zhiyong. Restoration of an electrical breakdown Terahertz emitter by 2 MeV He~+ ion implantation[J]. Nuclear techniques, 2009, 32(1): 27-30.
YANG Kang MA Mingwang CHEN Xiliang ZHU Zhiyong. Restoration of an electrical breakdown Terahertz emitter by 2 MeV He~+ ion implantation[J]. Nuclear techniques, 2009, 32(1): 27-30.DOI:
The irradiation of solids by energetic particles may cause extensive displacement cascades and point defects (vacancies and interstitials)
and can be widely used for material modification. In order to repair an electrical breakdown photoconductive antenna (PCA)
we irradiated the (100)-oriented
low-temperature (LT) grown GaAs substrate with 1016/cm2 of 2 MeV helium ions. After being implanted
electric resistance of the PCA has increased from 800 ? to 60 M?. The irradiated PCA exhibits improvements in the output power in comparison with the electrical breakdown PCA and its signal intensity has increased from 2 nA to 8 nA. Accordingly
its output power has become more than one order of magnitude higher than that before irradiation. The frequency range of PCA has obviously improvement.