Waveguide quantum photonics on a silicon chip

Nobuyuki Matsuda, Hiroki Takesue

Abstract Integrated quantum photonics is now seen as one of the promising approaches to realize scalable quantum information systems. With optical waveguides based on silicon photonics technologies, we can realize quantum optical circuits with a higher degree of integration than with silica waveguides. In addition, thanks to the large nonlinearity observed in silicon nanophotonic waveguides, we can implement active components such as entangled photon sources on a chip. In this paper, we report recent progress in integrated quantum photonic circuits based on silicon photonics. We review our work on correlated and entangled photon‐pair sources on silicon chips, using nanoscale silicon waveguides and silicon photonic crystal waveguides. We also describe an on‐chip quantum buffer realized using the slow‐light effect in a silicon photonic crystal waveguide. As an approach to combine the merits of different waveguide platforms, a hybrid quantum circuit that integrates a silicon‐based photon‐pair source and a silica‐based arrayed waveguide grating is also presented.

Anonymous

Nobuyuki Matsuda, Péter Karkus, Hidetaka Nishi +4 more

We demonstrate the generation and demultiplexing of quantum correlated photons on a monolithic photonic chip composed of silicon and silica-based waveguides. Photon pairs generated in a nonlinear silicon waveguide are successfully separated into two optical channels of an arrayed-waveguide grating fabricated on a silica-based waveguide platform.

Damien Bonneau, Joshua W. Silverstone, Mark G. Thompson

Joshua W. Silverstone, Damien Bonneau, Jeremy L. O’Brien +1 more

Nobuyuki Matsuda, Péter Karkus, Hidetaka Nishi +4 more

We demonstrate the generation and demultiplexing of quantum correlated photons on a chip. Photon pairs generated in a nonlinear silicon waveguide are successfully separated into two optical channels of an arrayed-waveguide grating made on a low-nonlinear silica platform.