Researchers have developed and demonstrated a GaP-on-diamond hybrid nanophotonic platform enabling controlled interaction between photons and silicon-vacancy (SiV) centers in diamond. Using stamp transfer, the team fabricated more than 600 nanophotonic cavities on a diamond substrate with a yield of 99.5%, achieving cooperativity above 1 and a spin relaxation time exceeding 0.4 milliseconds, enabling single-shot readout of SiV electron spins. Next steps include connecting multiple devices on the same chip and demonstrating entanglement.
Why we recommend it: A transfer process that avoids etching the diamond balances device yield with spin-photon coupling, offering a concrete example of how quantum network interfaces could move toward scalable manufacturing.
Researchers integrated gallium phosphide (GaP) nanophotonic cavities onto a diamond substrate using a stamp transfer process, enhancing quantum optical interaction with diamond color centers. The devices are first fabricated by electron-beam lithography in a GaP thin film on a carrier, screened by spectroscopic testing, and then transferred. Experiments achieved cooperativity above 1. The platform can serve as a light-matter interface in quantum networks.
Why we recommend it: The source details the heterogeneous integration process and the screening-and-transfer workflow, offering useful reference for fabrication routes for diamond color center quantum photonic devices.
A paper in Science reports that researchers entangled a levitated glass nanosphere with an optical field in an optical trap, achieving the effect at room temperature and providing a new platform for macroscopic quantum mechanics research.
Why we recommend it: The original article reports entanglement of a macroscopic object with light at room temperature, relevant to optomechanics and quantum sensing
Why we recommend it: The original paper transmitted a high-dimensional cluster state over actually deployed fiber, offering useful lessons for quantum network engineering
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Shanghai Institute of Optics and Fine Mechanics (SIOM) · Research UpdatesOptics industryPicksAI score6363
Researcher Tian Ye and Academician Li Ruxin at the Shanghai Institute of Optics and Fine Mechanics (SIOM), together with Researcher Pan Yiming at ShanghaiTech University and colleagues, have proposed a new mechanism that uses the quadratic phase accumulated during the propagation of free-electron quantum wave packets to simultaneously achieve selectable high-harmonic bunching and synthesis of nonclassical quantum light, linking quantum state control, high-harmonic radiation and quantum light synthesis.
Why we recommend it: The original paper proposes a unified framework for free-electron lasers and quantum light sources, relevant to novel light source research
Shuo Sun and colleagues used fishbone photonic crystal cavities to combine diamond nanobeams with titanium dioxide integrated optical circuits, achieving heterogeneous integration.
Why we recommend it: The original paper presents a new structure coupling diamond color centers to integrated optical circuits, relevant to quantum photonic chips
Researchers at TU Wien propose that letting photons change shape as they propagate could enable perfect quantum information transfer between quantum network nodes.