Device topologies for electro-photonic integrated circuits comprising transmitters and receivers

A monolithic electro-photonic integrated circuit comprising a transmitter and a receiver, wherein the transmitter comprises an electro-absorption modulator (EAM) and an EAM driver circuit and the receiver comprises a waveguide (WG)-photodiode (PD) and a transimpedance amplifier (TIA), comprising:

• a semi-insulating (SI) substrate,
• an epitaxial layer stack formed on the SI substrate,
• the epitaxial layer stack comprising:
• a first plurality of semiconductor layers formed on the SI substrate comprising layers of electronic components comprising heterojunction bipolar transistors of the EAM driver circuit and the TIA;
• at least one spacer layer;
• a second plurality of semiconductor layers overlying the first plurality of semiconductor layers and the at least one spacer layer, the second plurality of semiconductor layers comprising layers of photonic components comprising a first optical waveguide of the EAM and a second optical waveguide of the WG-PD;
• the photonics components comprising the EAM and the WG-PD being formed over a first device area and the electronics components comprising the EAM driver circuit and the TIA being formed over a second device area;
• and
• at least one metallization layer providing electrical interconnections between the EAM driver circuit and the EAM and between the WG-PD and the TIA.