The Influence of EL2 Centers on the Photoelectric Response of an Array of Radial GaAs/AlGaAs Nanowires

We have studied the role of EL2 centers in formation of the photoelectric response of an array of radial n -type GaAs/Al x Ga 1 – x As ( x = 0.3) nanowires (NWs) grown by molecular beam epitaxy on a p -type silicon substrate. Results revealed a significant decrease in the time of NW photoresponse recovery as compared to that in a bulk crystal upon the transition of EL2 centers from a metastable nonactive state to the normal ground state.