Materials for optics articles within Nature

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  • Analysis
    | Open Access

    Efficiency roll-off in a wide range of TADF OLEDs is analysed and a figure of merit proposed for materials design to improve efficiency at high brightness, potentially expanding the range of applications of TADF materials.

    • S. Diesing
    • , L. Zhang
    •  & I. D. W. Samuel

  • Article
    | Open Access

    An experimental design consisting of a photonic-crystal nanoslab covered with upconversion nanoparticles demonstrates the phenomenon of supercritical coupling, resulting in giant enhancement of upconversion by photonic bound states in the continuum.

    • Chiara Schiattarella
    • , Silvia Romano
    •  & Gianluigi Zito

  • 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
    | Open Access

    Lithographically patterned perovskite nanocrystal arrays were used to determine radiation vectors from X-rays to visible light and the emission colours of the nanoparticles was used to create images of three-dimensional objects and for phase-contrast imaging.

    • Luying Yi
    • , Bo Hou
    •  & Xiaogang Liu

  • Article |

    Self-limited assembly of 'imperfect' chiral nanoparticles enables formation of bowtie-shaped microparticles with size monodispersity and continuously variable chirality to be used for printing photonically active metasurfaces.

    • Prashant Kumar
    • , Thi Vo
    •  & Nicholas A. Kotov

  • Article |

    Perovskite LEDs with exceptional performance at high brightness are demonstrated achieving an operational half-lifetime of 32 hours, an important step towards commercialization opening up new opportunities beyond conventional LED technologies, such as perovskite electrically pumped lasers.

    • Yuqi Sun
    • , Lishuang Ge
    •  & Neil C. Greenham

  • Article |

    By using new on-chip terahertz spectroscopy techniques to measure the absorption spectra of a graphene microribbon as well as the energy waves close to charge neutrality, hydrodynamic collective excitations are observed.

    • Wenyu Zhao
    • , Shaoxin Wang
    •  & Feng Wang

  • Article |

    A van der Waals crystal, niobium oxide dichloride, with vanishing interlayer electronic coupling and considerable monolayer-like excitonic behaviour in the bulk, as well as strong and scalable second-order optical nonlinearity, is discovered, which enables a high-performance quantum light source.

    • Qiangbing Guo
    • , Xiao-Zhuo Qi
    •  & Andrew T. S. Wee

  • 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 |

    Chiroptically active pinwheel assemblies on substrates are formed by tetrahedral gold nanoparticles from the effective ‘compression’ of a perovskite-like, low-density phase, thereby enabling the manufacture of metastructured coatings with special chiroptical characteristics as identified by photon-induced near-field electron microscopy and chirality measures.

    • Shan Zhou
    • , Jiahui Li
    •  & Qian Chen

  • Article |

    A study reports europium molecular crystals with optically addressable spin states that exhibit ultra-narrow linewidths, demonstrating the use of rare-earth molecular crystals as a platform for photonic quantum technologies.

    • Diana Serrano
    • , Senthil Kumar Kuppusamy
    •  & Philippe Goldner

  • Article
    | Open Access

    Shear phenomena in the infrared dielectric response of a monoclinic crystal are shown to unveil a new polariton class termed hyperbolic shear polariton that can emerge in any low-symmetry monoclinic or triclinic system.

    • Nikolai C. Passler
    • , Xiang Ni
    •  & Alexander Paarmann

  • Article |

    High-performance optoelectronic devices that operate in the infrared regime at room temperature exhibit wide-range, active and reversible tunability of the operating wavelengths with black phosphorus.

    • Hyungjin Kim
    • , Shiekh Zia Uddin
    •  & Ali Javey

  • Article |

    Cadmium-free blue quantum dot light-emitting diodes are constructed with a quantum yield of unity, an efficiency at the theoretical limit, high brightness and long operational lifetime.

    • Taehyung Kim
    • , Kwang-Hee Kim
    •  & Eunjoo Jang

  • Article |

    Combining thermal scanning-probe lithography with templating enables the production of high-quality gratings that manipulate light through Fourier-spectrum engineering in ways that are not achievable with conventional gratings.

    • Nolan Lassaline
    • , Raphael Brechbühler
    •  & David J. Norris

  • Article |

    A hexagonal (rather than cubic) alloy of silicon and germanium that has a direct (rather than indirect) bandgap emits light efficiently across a range of wavelengths, enabling electronic and optoelectronic functionalities to be combined on a single chip.

    • Elham M. T. Fadaly
    • , Alain Dijkstra
    •  & Erik P. A. M. Bakkers

  • Letter |

    Organic light-emitting devices containing radical emitters can achieve an efficiency of 27 per cent at deep-red and infrared wavelengths based on the excitation of spin doublets, rather than singlet or triplet states.

    • Xin Ai
    • , Emrys W. Evans
    •  & Feng Li

  • Letter |

    Cooperative quantum effects in superlattices of quantum dots made of caesium lead halide perovskite give rise to superfluorescence, with the individual emitters interacting coherently to give intense bursts of light.

    • Gabriele Rainò
    • , Michael A. Becker
    •  & Thilo Stöferle

  • Letter |

    A scalable thermal drawing process is used to integrate light-emitting and photodetecting diodes into textile-ready polymer fibres, which can be woven into fabrics with possible optical communication and health monitoring applications.

    • Michael Rein
    • , Valentine Dominique Favrod
    •  & Yoel Fink

  • Letter |

    A blend of two organic molecules excited by a simple LED light source can release the stored excitation energy slowly as ‘long persistent luminescence’ over periods of up to an hour.

    • Ryota Kabe
    •  & Chihaya Adachi

  • Letter |

    Light-field-driven control of electrons in a conductor is demonstrated by inducing a current by laser pulses in graphene that is sensitive to the carrier-envelope phase.

    • Takuya Higuchi
    • , Christian Heide
    •  & Peter Hommelhoff

  • Letter |

    The incorporation of large numbers of chemically diverse functional components into microfabricated structures at precise locations is challenging; now the precision placement of DNA origami by directed self-assembly is shown to overcome this problem for the purpose of reliably and controllably coupling molecular emitters to photonic crystal cavities.

    • Ashwin Gopinath
    • , Evan Miyazono
    •  & Paul W. K. Rothemund

  • 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 |

    A miniature laser is reported that uses two-dimensional tungsten diselenide as the active medium, which is placed on a photonic crystal membrane that acts as the laser cavity; the laser emits visible light, with an ultralow pump threshold.

    • Sanfeng Wu
    • , Sonia Buckley
    •  & Xiaodong Xu

  • Letter |

    The insertion of an insulating layer into a multilayer light-emitting diode (LED) based on quantum dots and produced by depositing the layers from solution increases the performance of the LEDs to levels comparable to those of state-of-the-art organic LEDs produced by vacuum deposition, while retaining the advantages of solution processing.

    • Xingliang Dai
    • , Zhenxing Zhang
    •  & Xiaogang Peng

  • Letter |

    Here stable colour changes induced by solid-state electrical switching of ultrathin films of a germanium–antimony–telluride alloy are demonstrated, adding to its established uses in data storage; possible applications include flexible and transparent displays.

    • Peiman Hosseini
    • , C. David Wright
    •  & Harish Bhaskaran

  • 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

  • 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

  • Outlook |

    The same property that gives stained glass windows their sublime beauty is being crafted in the latest nanophotonic technologies, says Anatoly V. Zayats.

    • Anatoly V. Zayats

  • Outlook |

    Invisibly small particles of gold can be used to manipulate the properties of light.

    • Neil Savage

  • News & Views |

    A class of fluorescent organic molecule has been designed that enables highly efficient light-emitting diodes to be made. The devices may turn out to be competitors to their conventional analogues. See Letter p.234

    • Brian D'Andrade

  • Letter |

    A broadband, compact, all-electrically driven mid-infrared frequency comb based on a quantum cascade laser widens the scope of application of combs in this frequency range beyond that of sources which depend on a chain of optical components.

    • Andreas Hugi
    • , Gustavo Villares
    •  & Jérôme Faist

  • Letter |

    A class of metal-free organic electroluminescent molecules is designed in which both singlet and triplet excitons contribute to light emission, leading to an intrinsic fluorescence efficiency greater than 90 per cent and an external electroluminescence efficiency comparable to that achieved in high-efficiency phosphorescence-based organic light-emitting diodes.

    • Hiroki Uoyama
    • , Kenichi Goushi
    •  & Chihaya Adachi

  • News |

    The US National Ignition Facility rethinks its strategy on achieving thermonuclear fusion in the lab, but fails to silence critics.

    • Geoff Brumfiel

  • Outlook |

    Roy Glauber shared the Nobel Prize in Physics in 2005. He was cited for his contribution to the quantum theory of optical coherence, which explains why many experiments, using lasers for example, can only be understood if light is explicitly considered to be granular (composed of individual photons). His work laid the foundations of a field now known as quantum optics.

    • Andreas Trabesinger

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