3D Plot from Scientific Research

Schematic drawing showing the Ge/SiGe heterostructure and three layers of gate electrodes on top to define the quantum dot ladder and sensing dots: screening gates (purple), plunger gates (red) and barrier gates (green). Ohmic contacts (grey) extend towards the germanium quantum well in which the holes are confined. The aluminium oxide dielectric between different gate layers is omitted for clarity.

DOI