Diamond integrated quantum photonics

Francesco Lenzini, Nico Gruhler, Nicolai Walter +1 more

Francesco Lenzini, Nico Gruhler, Nicolai Walter +1 more

Abstract Integrated quantum photonics enables the generation, manipulation, and detection of quantum states of light in miniaturized waveguide circuits. Implementation of these three operations in a single integrated platform is a crucial step toward a fully scalable approach to quantum photonic technologies. In this context, diamond has emerged as a particularly promising material as it naturally combines a large transparency range for the fabrication of low‐loss photonic circuits, and a variety of optically active defects for the realization of efficient single‐photon emitters. Furthermore, its high Young's modulus makes it ideal for the implementation of tunable optomechanical devices for active quantum state manipulation. This review reports recent progress on the realization of the main components required for a diamond‐based integrated quantum photonic architecture: single‐photon emitters, static and actively tunable waveguide circuits, and, as a last building block, integrated superconducting single‐photon detectors.

Ching Eng Png, G. Alagappan

Francesco Lenzini, Nico Gruhler, Nicolai Walter +1 more

Diamond has emerged as an optimal platform for the realization of fully integrated quantum photonic technologies. In the cover image, a set of electrically tunable color centers supply a source of indistinguishable single photons in different diamond waveguides; a network of directional couplers and opto-mechanical phase shifters is employed for active manipulation of quantum states of light, which are detected at the output of the circuit by integrated superconducting single photon detectors. For further details see the Review (article number 1800061) by Wolfram Pernice and co-workers.

Constantin Dory, Dries Vercruysse, Ki Youl Yang +10 more

Constantin Dory, Dries Vercruysse, Ki Youl Yang +9 more