Fig. 1From: Design and performance analysis of integrated focusing grating couplers for the transverse-magnetic TM00 mode in a photonic BiCMOS technologyExample of a photonic BiCMOS platform in cross-section. Electronics (e.g. heterojunction bipolar transistors, HBT) in bulk-Si depicted on the right hand side are integrated in parallel with silicon-on-insulator (SOI) photonic components in the frontend of line (FEOL). Both are covered by a complex backend of line (BEOL) stack, here represented in a simplified formBack to article page