Diamonds represent not only eternal but also important materials in integrated quantum photonic devices.

Abstract The emergence of integrated quantum photonics has made it possible to generate, manipulate and detect quantum states of light in micro-waveguides. Implementing these three operations simultaneously in a single, independent integration platform is a critical step in achieving quantum photonics. Because it can also make low loss at the same time...

The advent of integrated quantum photonics has made it possible to generate, manipulate and detect quantum states of light in micro-waveguides. Implementing these three operations simultaneously in a single, independent integration platform is a critical step in achieving quantum photonics. Diamond (diamond) has become a particularly promising material because it combines the large pass light (transparency) range required to make low loss photonic lines with the optically active defects required to achieve efficient single photon emission. In addition, the high Young's modulus of diamond also makes it an ideal choice for tunable optomechanical devices that implement active quantum state operation.

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Professor Wolfram HP Pernice from the University of Münster in Germany published a review paper in the journal Advanced Quantum Technologies, reporting on recent advances in the implementation of diamond-based integrated quantum photonic devices, including single-photon emitters, passive and active tunables. Waveguide lines, as well as integrated superconducting single photon detectors. In the review, the author also proposes the future challenges of fully integrated quantum photonic circuits based on diamonds, such as the technical difficulties in pumping optical filtering in the case of optically pumped color centers, enabling multiple single photon emitters and the same integrated waveguide network. The problem of isotropic (indistinguishability) between photons when coupled, and how to improve the performance of single photon detectors by special polishing of diamond films.

Related articles are published online at Advanced Quantum Technologies (DOI: 10.1002/qute.201800061).

Xu Xiaoye from the University of Science and Technology of China participated in the writing.

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