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. Author manuscript; available in PMC: 2021 Nov 22.
Published in final edited form as: Nat Photonics. 2020;14(5):10.1038/s41566-020-0609-x. doi: 10.1038/s41566-020-0609-x

Fig. 4. Advanced hybrid systems.

Fig. 4

(a) hybrid system consisting of nonlinear lithium niobate waveguides and femto-second-laser-direct-written waveguides to generate two-photon states [87]. (b) Hybrid integrated of near-indistinguishable 72 artificial atoms, germanium-vacancy (GeV) and silicon-vacancy (SiV) colour centres in diamond, to aluminum nitride photonic integrated circuit [88]. (c) A proof-of-concept integrated quantum link at telecom wavelength consisting of electrically triggered carbon nanotube single photon sources, silicon nitride nanowaveguide, and superconducting single photon detectors, all fabricated on on a single chip [27]. (d) Number of key physical resources realized versus demonstration year, with additional information regarding the operation temperature and the method of integration used (* No specific number of devices is presented, but the fabrication is done on a wafer-scale, the main limitation is the device size, 3mm long MZM)