Figure 3
From: Ultraviolet Lasers Realized via Electrostatic Doping Method
(a) EL spectra measured from the top surface of the Au/MgO/ZnO structure. In the measurement, |VGS| is set as −50 V and |IDS| varies from 0.1 to 2.5 mA. The inset shows the dependence of the integrated emission intensity on |IDS|; (b) Far-field emission image recorded from the top surface of the Au/MgO/ZnO structure.
