Prof. Alastair Stacey

RMIT University, Australia
Alastair Stacey, Professor of Physics at RMIT University and Managing Principal Research Physicist at the Princeton Plasma Physics Laboratory (PPPL), is an expert in diamond technologies, including diamond synthesis by plasma vapor deposition. He has extensive experience in the study of diamond materials and surface science for quantum applications. He has developed novel diamond growth and surface termination chemistries for applications ranging from biomedical sensors to electron emitters and quantum sensors. These take advantage of diamond’s superlative material properties, including extreme electron affinities, biocompatibility and long coherence properties for quantum defects.

Talk title: Diamond surface science for quantum and electronics applications
Diamond materials possess superlative properties, ideal for room temperature quantum and various electronics applications. However, realization of devices in such applications inevitably requires development of a toolbox of surface and interface science and functionalities. While diamond’s lack of solid-state oxide is a boon in this regard, it has shown to be an otherwise challenging surface material to control. In this presentation I will detail our efforts to identify crystallographic defects at the diamond surface [1], how these relate to epitaxial growth processes and the potential impact of such defects on electronic device parameters, such as band bending  [2] and Fermi level pinning. I will describe our efforts to control the surface chemistry of diamond, to create novel surface termination chemistries and to fabricate quantum electronic and electron emission devices, including for medical diagnostic imaging applications  [3].