Optics and photonics

  • Letter |

    A spatially oscillating two-dimensional waveguide array is used to realize a photonic topological insulator in synthetic dimensions with modal-space edge states, unidirectionality and robust topological protection.

    • Eran Lustig
    • , Steffen Weimann
    •  & Mordechai Segev
  • Letter |

    Waveguide quantum electrodynamics is used to couple a single collective excitation of an atomic array to a nanoscale waveguide; the excitation is stored and later read out, generating guided single photons on demand.

    • Neil V. Corzo
    • , Jérémy Raskop
    •  & Julien Laurat
  • Letter |

    A faint penumbra in a photograph of a diffuse surface enables recovery of the position of the object creating the penumbra and an image of the scene behind it.

    • Charles Saunders
    • , John Murray-Bruce
    •  & Vivek K Goyal
  • 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
  • Letter |

    Terahertz light pulses induce transitions between a topological and a trivial phase in the Weyl semimetal WTe2 through an interlayer shear strain.

    • Edbert J. Sie
    • , Clara M. Nyby
    •  & Aaron M. Lindenberg
  • Letter |

    A refractive lens and a refractive prism for extreme-ultraviolet radiation have been developed that use the deflection of the radiation in an inhomogeneous jet of atoms.

    • L. Drescher
    • , O. Kornilov
    •  & B. Schütte
  • Letter |

    Improved techniques allow the measurement of a frequency difference with an uncertainty of the order of 10–19 between two independent atomic optical lattice clocks, suggesting that they may be able to improve state-of-the-art geodetic techniques.

    • W. F. McGrew
    • , X. Zhang
    •  & A. D. Ludlow
  • Perspective |

    This Perspective discusses developments in LED-based solid-state lighting for physiological and agricultural applications, and the anticipated benefits in terms of health and productivity.

    • P. M. Pattison
    • , J. Y. Tsao
    •  & B. Bugbee
  • 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
  • Article |

    The displacement of a mechanical resonator is measured to within 35% of the Heisenberg uncertainty limit, enabling feedback cooling to the quantum ground state, nine decibels below the quantum-backaction limit.

    • Massimiliano Rossi
    • , David Mason
    •  & Albert Schliesser
  • Letter |

    Contrary to current expectation, eavesdropping on terahertz wireless data links is shown to be easier than expected, by placing an object in the path of the signal that scatters part of it to a receiver located elsewhere.

    • Jianjun Ma
    • , Rabi Shrestha
    •  & Daniel M. Mittleman
  • Letter |

    Integrating an optical Kerr frequency comb source with an electronically excited laser pump produces a battery-powered comb generator that does not require external lasers, moveable optics or laboratory set-ups.

    • Brian Stern
    • , Xingchen Ji
    •  & Michal Lipson
  • Letter |

    The absolute timing of the photoelectric effect has proved difficult to measure, but the delay between photon arrival at a tungsten surface and ejection of photoelectrons has now been determined.

    • M. Ossiander
    • , J. Riemensberger
    •  & R. Kienberger
  • Letter |

    Topologically protected edge states realized in a square array of ring resonators are used to demonstrate a robust source of heralded single photons produced by spontaneous four-wave mixing.

    • Sunil Mittal
    • , Elizabeth A. Goldschmidt
    •  & Mohammad Hafezi
  • 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 |

    All-inorganic perovskite nanocrystals containing caesium and lead provide low-cost, flexible and solution-processable scintillators that are highly sensitive to X-ray irradiation and emit radioluminescence that is colour-tunable across the visible spectrum.

    • Qiushui Chen
    • , Jing Wu
    •  & Xiaogang Liu
  • Letter |

    A counter-intuitive state—known as a topological Anderson insulator—in which strong disorder leads to the formation of topologically protected rather than trivial states is realized in a photonic system.

    • Simon Stützer
    • , Yonatan Plotnik
    •  & Alexander Szameit
  • 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 |

    The fundamental limits to plasmon damping in graphene are determined using nanoscale infrared imaging at cryogenic temperatures, and plasmon polaritons are observed to propagate over 10 micrometres in high-mobility encapsulated graphene.

    • G. X. Ni
    • , A. S. McLeod
    •  & D. N. Basov
  • Letter |

    A strong lightwave in a monolayer of tungsten diselenide drives changes in the valley pseudospin, making valley pseudospin an information carrier that is switchable faster than a single light cycle.

    • F. Langer
    • , C. P. Schmid
    •  & R. Huber
  • Letter |

    An optical-frequency synthesizer based on stabilized frequency combs has been developed utilizing chip-scale devices as key components, in a move towards using integrated photonics technology for ultrafast science and metrology.

    • Daryl T. Spencer
    • , Tara Drake
    •  & Scott B. Papp
  • Letter |

    Quantum entanglement is demonstrated in a system of massive micromechanical oscillators coupled to a microwave-frequency electromagnetic cavity by driving the devices into a steady state that is entangled.

    • C. F. Ockeloen-Korppi
    • , E. Damskägg
    •  & M. A. Sillanpää
  • Letter |

    Ohmic losses in plasmonic devices can be reduced by exploiting ‘resonant switching’, in which light couples to surface plasmon polaritons only when in resonance and bypasses them otherwise.

    • Christian Haffner
    • , Daniel Chelladurai
    •  & Juerg Leuthold
  • Letter |

    Using optical mapping and 3D ultrasound, the dynamics and interactions between electrical and mechanical phase singularities were analysed by simultaneously measuring the membrane potential, intracellular calcium concentration and mechanical contractions of the heart during normal rhythm and fibrillation.

    • J. Christoph
    • , M. Chebbok
    •  & S. Luther
  • Letter |

    Photophoretic optical trapping of cellulose particles and persistence of vision are used to produce real-space volumetric images that can be viewed from all angles, in geometries unachievable by holograms and light-field technologies.

    • D. E. Smalley
    • , E. Nygaard
    •  & J. Peatross
  • Letter |

    The lowest-energy exciton state in caesium lead halide perovskite nanocrystals is shown to be a bright triplet state, contrary to expectations that lowest-energy excitons should always be dark.

    • Michael A. Becker
    • , Roman Vaxenburg
    •  & Alexander L. Efros