Microwave photonics articles within Nature Communications

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  • Article
    | Open Access

    Realizing metasurfaces with reconfigurability, high efficiency, and control over phase and amplitude is a challenge. Here, Li et al. introduce a reprogrammable hologram based on a 1-bit coding metasurface, where the state of each unit cell of the coding metasurface can be switched electrically.

    • Lianlin Li
    • , Tie Jun Cui
    •  & Shuang Zhang

  • Article
    | Open Access

    Topological effects known from condensed matter physics have recently also been explored in photonic systems. Here, the authors directly observe topological surface-state arcs in momentum space by near-field scanning the surface of a chiral hyperbolic metamaterial.

    • Biao Yang
    • , Qinghua Guo
    •  & Shuang Zhang

  • Article
    | Open Access

    Reflectionless absorption independent of the angle of incidence usually requires the introduction of gain media into the system. Here, Ye et al. implement a recent theoretical proposal to achieve this with a spatially varying permittivity, showing that this approach is experimentally feasible.

    • Dexin Ye
    • , Cheng Cao
    •  & Lixin Ran

  • Article
    | Open Access

    Traditional metallic communication elements suffer from substantial losses in the visible and near-infrared. Here, Barredaet al. show in a proof of principle in the microwave regime that a pair of high-index dielectric spheres can operate as a perfect switch in a beam-splitter configuration.

    • Ángela I. Barreda
    • , Hassan Saleh
    •  & Fernando Moreno

  • Article
    | Open Access

    The refractive index of natural materials only covers a limited range. Here, Chang et al. use the principle of space-filling curves to construct a mesoscopic crystal with a refractive index greater than 1000 at GHz frequencies. The concept is inherently broadband and scalable.

    • Taeyong Chang
    • , Jong Uk Kim
    •  & Jonghwa Shin

  • Article
    | Open Access

    Microwave single photon sources are important for quantum applications, but their design often incorporates a resonator that fixes the frequency of the emitted photon. Here, the authors demonstrate a tuneable on-demand photon source based on an artificial atom asymmetrically coupled to two transmission lines.

    • Z. H. Peng
    • , S. E. de Graaf
    •  & O. V. Astafiev

  • Article
    | Open Access

    Single-photon detection is challenging in the microwave regime due to the small photon energy. Here, the authors demonstrate the deterministic detection of single microwave photons through an impedenance-matched artificial Λ system composed by a driven superconducting qubit and a microwave resonator.

    • Kunihiro Inomata
    • , Zhirong Lin
    •  & Yasunobu Nakamura

  • Article
    | Open Access

    Maser applications are hindered by their demanding working conditions. Here, Jinet al. theoretically propose a room-temperature maser based on nitrogen vacancy centres in diamond. This numerical study demonstrates that the operation of the maser under readily accessible conditions is feasible.

    • Liang Jin
    • , Matthias Pfender
    •  & Ren-Bao Liu

  • Article |

    Controlling the electrical properties of radar absorbing materials is required for active camouflage systems in the microwave. Here, Balci et al.use large-area graphene electrodes to demonstrate electrical control of microwave reflection, transmission and absorption by electrostatic tuning of the charge density.

    • Osman Balci
    • , Emre O. Polat
    •  & Coskun Kocabas

  • Article |

    Controlling the propagation of microwaves in air is hard because of their divergence and the lack of suitable optics. Kudyshev et al. show how this can be overcome using plasma channels to create virtual hyperbolic metamaterials to collimate and guide radar beams.

    • Zhaxylyk A. Kudyshev
    • , Martin C. Richardson
    •  & Natalia M. Litchinitser

  • Article
    | Open Access

    Microwaves are of interest for applications such as communications, radar and metrology. Here, Li et al. demonstrate an on-chip microresonator device for the generation of microwaves by optical means, instead of the usual electronic devices.

    • Jiang Li
    • , Hansuek Lee
    •  & Kerry J. Vahala

  • Article |

    The flexibility of microwave photonics provides advantages over electronic circuitry, yet the lack of integrated chip-scale devices limits its practical application. This study presents microwave filters based on photonic crystal waveguides with controllable delays as a step towards intregable circuits.

    • Juan Sancho
    • , Jerome Bourderionnet
    •  & Alfredo De Rossi

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