Other photonics

  • Article |

    Stable, dissipative optomechanical solitons are realized using optical fields in a whispering gallery mode resonator by balancing the optomechanical nonlinearities with a tailored modal dispersion.

    • Jing Zhang
    • , Bo Peng
    •  & Lan Yang
  • Article |

    An optical vector convolutional accelerator operating at more than ten trillion operations per second is used to create an optical convolutional neural network that can successfully recognize handwritten digit images with 88 per cent accuracy.

    • Xingyuan Xu
    • , Mengxi Tan
    •  & David J. Moss
  • Article |

    An integrated photonic processor, based on phase-change-material memory arrays and chip-based optical frequency combs, which can operate at speeds of trillions of multiply-accumulate (MAC) operations per second, is demonstrated.

    • J. Feldmann
    • , N. Youngblood
    •  & H. Bhaskaran
  • Article |

    By monolithically integrating piezoelectric actuators on ultralow-loss photonic circuits, soliton microcombs—a spectrum of sharp lines over a range of optical frequencies—can be modulated at high speeds with megahertz bandwidths.

    • Junqiu Liu
    • , Hao Tian
    •  & Tobias J. Kippenberg
  • Article |

    Branched flow of light is experimentally observed inside a thin soap membrane, where smooth variations of the membrane thickness transform the light beam into branched filaments of enhanced intensity that keep dividing as the waves propagate.

    • Anatoly Patsyk
    • , Uri Sivan
    •  & Miguel A. Bandres
  • Article |

    A turnkey regime for soliton microcombs is demonstrated, in which solitons are generated by switching on a co-integrated pump laser, eliminating the need for photonic and electronic control circuitry.

    • Boqiang Shen
    • , Lin Chang
    •  & John E. Bowers
  • Article |

    Wave destabilization is demonstrated in semiconductor ring lasers operating at low pumping levels, where ultrafast gain recovery leads to the emergence of a frequency comb regime owing to phase turbulence.

    • Marco Piccardo
    • , Benedikt Schwarz
    •  & Federico Capasso
  • Article |

    A massively parallel coherent light detection and ranging (lidar) scheme using a soliton microcomb—a light source that emits a wide spectrum of sharp lines with equally spaced frequencies—is described.

    • Johann Riemensberger
    • , Anton Lukashchuk
    •  & Tobias J. Kippenberg
  • Letter |

    The transition energy of the first excited state of 229Th to the ground state is determined through the measurement of internal conversion electrons to correspond to a wavelength of 149.7 ± 3.1 nanometres.

    • Benedict Seiferle
    • , Lars von der Wense
    •  & Peter G. Thirolf
  • Letter |

    A low-power, fixed microwave signal in combination with an optical-pump signal generates an optical frequency comb that spans the whole wavelength range of the telecommunications C-band, with possible applications ranging from spectroscopy to optical communications.

    • Alfredo Rueda
    • , Florian Sedlmeir
    •  & Harald G. L. Schwefel
  • 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 |

    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 response of a ternary, parity–time-symmetric system that exhibits a third-order exceptional point increases as a function of the cube-root of induced perturbations.

    • Hossein Hodaei
    • , Absar U. Hassan
    •  & Mercedeh Khajavikhan
  • Letter |

    Ablation cooling is demonstrated as an effective means of removing material using successive bursts of laser pulses with short intraburst delay times; the technique allows the overall pulse energy to be decreased, overcoming negative thermal effects during the ablation process.

    • Can Kerse
    • , Hamit Kalaycıoğlu
    •  & Fatih Ömer Ilday
  • Article |

    Direct detection of the 229Th nuclear clock transition has been achieved, placing direct constraints on transition energy and half-life; these results are a step towards a nuclear clock, nuclear quantum optics and a nuclear laser.

    • Lars von der Wense
    • , Benedict Seiferle
    •  & Peter G. Thirolf
  • Letter |

    A multilayer photonic structure is described that strongly reflects incident sunlight while emitting heat selectively through an atmospheric transparency window to outer space; this leads to passive cooling under direct sunlight of 5 degrees Celsius below ambient air temperature, which has potential applications in air-conditioning and energy efficiency.

    • Aaswath P. Raman
    • , Marc Abou Anoma
    •  & Shanhui Fan
  • 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