Non-polar ZnO/(Zn,Mg)O heterostructures for intersubband devices: novel applications with an old material system? (Conference Presentation)

The development of Zinc Oxide (ZnO)-based applications have been strongly limited due to the lack of reproducible p-type doping. Here we present novel opportunities in the field of unipolar oxide wide band gap semiconductors. First we have developed the growth of nonpolar ZnO/ZnMgO multiple quantum wells (MQWs) and then we demonstrate that the structural and optical properties of the MQWs are reaching the required level for intersubband devices in terms of defects, surface and interface roughness and doping. We will show and discuss the most recent results as, for instance, intersubband transitions which have been observed in such structures. This "Zoterac" project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 665107