Reviews & Analysis

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  • A monolithic chip-scale ring laser gyroscope based on both Brillouin and Sagnac effects provides a sensitivity sufficient to measure sinusoidal rotations with an amplitude as small as 5 degrees per hour, thus enabling the first on-chip Earth rotation measurement.

    • Thibaut Sylvestre
    News & Views
  • Using a photonic crystal slab combined with a conventional optical imaging system, a two-dimensional optical image differentiator is experimentally demonstrated for edge detection.

    • Wei Yan
    • Min Qiu
    News & Views
  • Delegates at the BiOS symposium heard how artificial intelligence can transform medical imaging, with its ability to improve quality, speed and molecular specificity.

    • Rachel Won
    Meeting Report
  • Dark-field microscopy is a widely used imaging method that emphasizes sharp edges and other small features, but typically requires specialized microscope components. Researchers have now engineered special substrates that enable dark-field microscopy using simple bright-field microscopes.

    • Mikhail A. Kats
    News & Views
  • Exciton funnelling due to non-homogeneous strain was previously thought of as an efficient neutral exciton transport mechanism. New findings suggest that exciton funnelling might be negligible compared with another strain-dependent process, the conversion of neutral excitons into trions.

    • Riccardo Frisenda
    • Andres Castellanos-Gomez
    News & Views
  • The Review summarizes the progress of hybrid quantum photonics integration in terms of its important design considerations and fabrication approaches, and highlights some successful realizations of key physical resources for building integrated quantum devices, such as quantum teleporters, quantum repeaters and quantum simulators.

    • Ali W. Elshaari
    • Wolfram Pernice
    • Val Zwiller
    Review Article
  • Two articles in Nature Photonics demonstrate how Einstein–Podolsky–Rosen entanglement can reduce quantum noise in gravitational-wave interferometers.

    • Pierre-François Cohadon
    News & Views
  • The news that superconducting nanowire detectors can detect single photons with a timing precision of just a few picoseconds will benefit applications ranging from sensing to quantum communications.

    • Robert H. Hadfield
    News & Views
  • Low-loss composite systems based on integrating transition metal dichalcogenide monolayers on silicon nitride waveguides exhibit an unexpectedly strong electro-refractive response at near-infrared wavelengths, which is crucial for optical communications.

    • Sylvia Xin Li
    • Michael S. Strano
    News & Views
  • Technology borrowed from electron accelerator and beam physics looks set to push the performance of ultrafast-electron-diffraction-based pump–probe studies of matter.

    • Pietro Musumeci
    News & Views
  • The combination of high-order harmonic polarimetry and sub-cycle control of electronic trajectories gives insight into the birth of attosecond electronic wave packets in molecules.

    • Giuseppe Sansone
    News & Views
  • Registration fees, travel costs and visas, and time away from home and the lab, are all factors that can make attending scientific meetings in person difficult. Can online conferences provide a solution?

    • David Pile
    Meeting Report
  • A new light-field imaging scheme, employing stacks of transparent graphene photodetectors, has been demonstrated, providing a path to greatly simplify the otherwise complex three-dimensional imaging.

    • Khurram Shehzad
    • Yang Xu
    News & Views
  • Carbon-dot-based light-emitting diodes with narrowband efficient emission in the deep blue are an attractive candidate for future high-colour-purity flat-panel display and lighting applications.

    • Biao Zhao
    • Zhibin Wang
    • Zhan’ao Tan
    News & Views
  • Quantitative phase gradient images can now be captured in a single shot thanks to the use of two layers of compact, multifunctional dielectric metasurfaces.

    • YoonSeok Baek
    • YongKeun Park
    News & Views