2013/04/30 by Joshua W. Silverstone, Damien Bonneau, K. Ohira +19 · 9 citations
Computer Science · Engineering · Physics and Astronomy · #Chip #Computer science #Degenerate energy levels #Electronic circuit #Interference (communication) #Interferometry #Mechanical and Optical Resonators #Neural Networks and Reservoir Computing #Open quantum system #Optics #Optoelectronics #Photon #Photonic and Optical Devices #Photonics #Physics #Quantum #Quantum mechanics #Quantum optics #Quantum technology #Telecommunications #Waveguide #quant-ph
paper · pdf · doi:10.1038/nphoton.2013.339
published as Nature Photonics 8, 104-108 (2014)
openalex publication_date 2013/12/13 · arxiv created 2014/11/20 · arxiv updated 2014/11/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Large-scale integrated quantum photonic technologies will require the on-chip integration of identical photon sources with reconfigurable waveguide circuits. Relatively complex quantum circuits have already been demonstrated, but few studies acknowledge the pressing need to integrate photon sources and waveguide circuits together on-chip. A key step towards such large-scale quantum technologies is the integration of just two individual photon sources within a waveguide circuit, and the demonstration of high-visibility quantum interference between them. Here, we report a silicon-on-insulator device combining two four-wave mixing sources, in an interferometer with a reconfigurable phase shifter. We configure the device to create and manipulate two-colour (non-degenerate) or same-colour (degenerate), path-entangled or path-unentangled photon pairs. We observe up to 100.0+/-0.4% visibility quantum interference on-chip, and up to 95+/-4% off-chip. Our device removes the need for external photon sources, provides a path to increasing the complexity of quantum photonic circuits, and is a first step towards fully-integrated quantum technologies.