Electronic/photonic integrated circuit architecture and method of manufacture thereof

A method, comprising:

• forming a passive photonic layer over a device substrate, said passive photonic layer including at least one passive photonic element configured to propagate an optical signal therein;
• forming an electronic layer located between said device substrate and said passive photonic layer, said electronic layer including at least one electronic device configured to propagate an electrical signal therein;
• forming an active photonic layer over said passive photonic layer, said active photonic layer including an active photonic device optically coupled to said passive photonic element and configured to convert between said electrical signal and said optical signal.