Fig. 1 — Figure 1: Manufacturable integrated quantum photonic stack. a & b, Schematic of key components and process modules. We highlight (on right) additional process sexternal image — opens at the sourceEleven panels: (a) a 3-D render of silicon and silicon-nitride waveguides, a thermal phase shifter, a superconducting detector under a gold 'scatter mitigation' cage and a barium titanate (BTO) phase shifter; (b) a process cross-section, BTO marked next-generation 'Gen2'; (c) a photograph of a 300 mm wafer; (d) a render of the chip and fibre array on a ~2 K plate; (e–j) micrographs of source, waveguide, trench and detectors; (k) a photograph of racks beside a steel enclosure. It is Figure 1 of arXiv 2404.17570, 'A manufacturable platform for photonic quantum computing' (Alexander et al.). It shows photon sources, waveguides, phase shifters and single-photon detectors built together on one wafer.