Engineered electro-optic devices

A method of operating a hybrid quantum computing system, the method comprising:

• providing a classical computing system;
• providing one or more quantum computing chips coupled to the classical computing system, wherein the one or more quantum computing chips includes one or more electro-optic devices, each electro-optic device of the one or more electro-optic devices comprising:
• a substrate;
• a buffer layer coupled to the substrate and configured to at least partially relieve stress of a plurality of electro-optic material layers;
• a waveguide disposed above the substrate;
• a layer stack disposed on top of the waveguide and including the plurality of electro-optic material layers under tensile stress and characterized by a first lattice structure and crystallographic phase, wherein the electro-optic material layers are interleaved with a plurality of interlayers characterized by a second lattice structure;
• and
• a waveguide core disposed on top of a portion of the layer stack;
• performing one or more quantum computing processes using the one or more quantum computing chips.