Metamaterials articles within Nature

Featured

  • Article
    | Open Access

    Vectorial optoelectronic metasurfaces are described, showing that light pulses can be used to drive and direct local charge flows around symmetry-broken plasmonic nanostructures, leading to tunable responses in terahertz emission.

    • Jacob Pettine
    • , Prashant Padmanabhan
    •  & Hou-Tong Chen

  • Article |

    A high-throughput, non-contact framework is described that uses the laser-induced vibrational signatures of metamaterials to non-destructively quantify their omnidirectional elastic information, dynamic linear properties, damping properties and defects.

    • Yun Kai
    • , Somayajulu Dhulipala
    •  & Carlos M. Portela

  • Article |

    The cycles of laser light have been used to advance transmission electron microscopy to attosecond time resolution, revealing the interactions between light and matter in terms of their fundamental dimensions in space and time.

    • David Nabben
    • , Joel Kuttruff
    •  & Peter Baum

  • Article |

    Chiral metasurfaces have been produced, with experimental observation of intrinsic chiral bound states in the continuum, which may lead to applications in chiral light sources and detectors, chiral sensing, valleytronics and asymmetric photocatalysis.

    • Yang Chen
    • , Huachun Deng
    •  & Cheng-Wei Qiu

  • Article |

    An array of 2D crystals of isotropic, 432-symmetric chiral gold nanoparticles is shown to exhibit collective resonances with a strong and uniform chiral near field, allowing enantioselective detection by the collective circular dichroism.

    • Ryeong Myeong Kim
    • , Ji-Hyeok Huh
    •  & Ki Tae Nam

  • Article |

    The semiclassical quantization rule breaks down for a class of dispersionless flat bands, and their anomalous Landau level spectrum is characterized by their Hilbert–Schmidt quantum distance.

    • Jun-Won Rhim
    • , Kyoo Kim
    •  & Bohm-Jung Yang

  • Letter |

    A three-dimensional photonic topological insulator is presented, made of split-ring resonators with strong magneto-electric coupling, which has an extremely wide topological bandgap, forbidding light propagation.

    • Yihao Yang
    • , Zhen Gao
    •  & Hongsheng Chen

  • Review Article |

    Subwavelength-grating metamaterial structures, their main operation principles and their implementation in integrated photonic devices are reviewed.

    • Pavel Cheben
    • , Robert Halir
    •  & David R. Smith

  • Letter |

    A negative refractive index, a property that does not exist in natural materials, can be produced in so-called metamaterials by combining two building blocks; here it is shown that it is possible to design and fabricate a metamaterial with a negative refractive index that consists of only one type of building block by taking advantage of its crystalline structure, and this approach is demonstrated through an acoustic superlens.

    • Nadège Kaina
    • , Fabrice Lemoult
    •  & Geoffroy Lerosey

  • Letter |

    The ratio of in-plane stiffness to out-of-plane bending stiffness of graphene is shown to be similar to that of a piece of paper, which allows ideas from kirigami (a variation of origami that allows cutting) to be applied to micrometre-scale graphene sheets to build mechanically stretchable yet robust electrodes, springs and hinges.

    • Melina K. Blees
    • , Arthur W. Barnard
    •  & Paul L. McEuen

  • Letter |

    Visible-frequency hyperbolic metasurfaces defined on single-crystal silver exhibit negative refraction and diffraction-free propagation, as well as strong, dispersion-dependent spin–orbit coupling for propagating surface plasmon polaritons, with device performance greatly exceeding those of previous bulk metamaterial demonstrations.

    • Alexander A. High
    • , Robert C. Devlin
    •  & Hongkun Park

  • Letter |

    Multiple-quantum-well semiconductors can provide one of the largest known nonlinear material responses, which is, however, geometrically limited to light beams polarized perpendicular to the semiconductor layers; by coupling a plasmonic metasurface to the semiconductor heterostructure, this limitation can be lifted, opening a new path towards ultrathin planarized components with large nonlinear response.

    • Jongwon Lee
    • , Mykhailo Tymchenko
    •  & Mikhail A. Belkin

  • Outlook |

    Mechanical suits known as exoskeletons can help people with spinal cord injuries stand up and walk away from their wheelchairs — but not without training.

    • Peter Gwynne

  • Letter |

    The ‘time cloak’ experiment is extended here using a time analogue of the Talbot effect in optics — in which a plane wave incident on a diffraction grating produces repeated images of the grating at regular distances — to show that almost half of the time axis can be concealed.

    • Joseph M. Lukens
    • , Daniel E. Leaird
    •  & Andrew M. Weiner

  • Letter |

    A metamaterial is fabricated that yields a ‘left-handed’ response — characterized by a negative refractive index — to ultraviolet light incident at all angles, allowing both passive and active flat lensing of arbitrarily shaped, two-dimensional objects beyond the near field in free space.

    • Ting Xu
    • , Amit Agrawal
    •  & Henri J. Lezec

  • Outlook |

    Throughout history, gold has been prized around the world and eagerly sought. But where does it come from, and where does it all go? By Neil Savage.

    • Neil Savage

  • Letter |

    Randomly adsorbing chemically synthesized silver nanocubes, each of which is the optical analogue of a grounded patch antenna, onto a nanoscale-thick polymer spacer layer on a gold film results in a metamaterial surface with a reflectance spectrum that can be tailored by varying the geometry.

    • Antoine Moreau
    • , Cristian Ciracì
    •  & David R. Smith

  • Letter |

    An extremely large, negative refractive index is produced in a two-dimensional electron gas by exploiting its kinetic inductance, which is a manifestation of acceleration of the electrons by electromagnetic fields.

    • Hosang Yoon
    • , Kitty Y. M. Yeung
    •  & Donhee Ham

  • Comment |

    Combining Maxwell's equations with Einstein's general relativity promises perfect images and cloaking devices, explains Ulf Leonhardt.

    • Ulf Leonhardt

  • Letter |

    In the area of metamaterials it is shown that electromagnetic properties can be achieved that are not attainable with natural materials. The main research efforts have been directed towards experimentally realizing materials with negative refractive index, but to extend the potential and design flexibility for novel 'transformation optics' applications, it is of considerable interest to produce a material with unnaturally high refractive index. A broadband, flexible terahertz metamaterial with unprecedented high refractive index, reaching a value of 38.6, is now demonstrated.

    • Muhan Choi
    • , Seung Hoon Lee
    •  & Bumki Min

  • Letter |

    Metamaterials have the counterintuitive optical property of negative refraction index. They have a wide range of possible applications, including 'invisibility cloaks' and perfect lenses, but their performance is severely limited by absorption losses. These authors have incorporated an optical gain medium within a metamaterial as a way to compensate the intrinsic loss, and show that optical pumping leads to a significantly improved negative refraction index and figure of merit within the 722–738-nm visible wavelength range.

    • Shumin Xiao
    • , Vladimir P. Drachev
    •  & Vladimir M. Shalaev

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