Volume 12 Issue 11, November 2018

Volume 12 Issue 11

Tri-comb spectroscopy

Artist’s impression of triple-frequency-comb laser spectroscopy. Three different repetition-rate frequency combs are used to generate a high-resolution multidimensional coherent spectrum of a mixture of 87Rb and 85Rb isotopes in under one second. The approach is promising for remote chemical sensing applications.

See Cundiff et al.

Image: Brad Baxley, Part to Whole. Cover Design: Bethany Vukomanovic



  • Comment |

    Emil Wolf died in June 2018 at the age of 95. The father of optical coherence theory was at the University of Rochester for nearly 60 years. A memorial in August at the university attracted more than 150 attendees from around the world.

    • P. Scott Carney
    •  & Joseph Eberly


Books & Arts

Research Highlights

News & Views

  • News & Views |

    A single silicon double injection resonator provides flexible response shapes, large free spectral range and tolerance to temperature deviations and fabrication defects, paving the way for high-performance integrated photonics.

    • Jun Dong
  • News & Views |

    Spatial multiplexing enables the simultaneous generation of several low-noise frequency combs in a single microresonator, promising to enhance a host of applications such as multidimensional coherent spectroscopy.

    • Miro Erkintalo
  • News & Views |

    A boom of activity in the deployment of photonics in space is underway. That was the clear message from this year’s European Conference on Optical Communication in Italy.

    • Oliver Graydon


Review Articles

  • Review Article |

    Starting with a desired optical output it is possible to use computational algorithms to inverse design devices. The approach is reviewed here with an emphasis on nanophotonics.

    • Sean Molesky
    • , Zin Lin
    • , Alexander Y. Piggott
    • , Weiliang Jin
    • , Jelena Vucković
    •  & Alejandro W. Rodriguez


  • Letter |

    A nonlinear coherent spectroscopy that uses three slightly different repetition-rate frequency combs is demonstrated. A 2D spectrum with comb resolution is generated using only 365 milliseconds of data, almost 600 times faster than previous approaches.

    • Bachana Lomsadze
    • , Brad C. Smith
    •  & Steven T. Cundiff


  • Article |

    Perovskite quantum dots (QDs) are synthesized via an anion-exchange process where CsPbBr3 is used to realize a highly efficient red light-emitting diode (LED). The perovskite QD-based LED exhibits the highest external quantum efficiency of more than 20% compared with perovskite LEDs.

    • Takayuki Chiba
    • , Yukihiro Hayashi
    • , Hinako Ebe
    • , Keigo Hoshi
    • , Jun Sato
    • , Shugo Sato
    • , Yong-Jin Pu
    • , Satoru Ohisa
    •  & Junji Kido
  • Article |

    Synchronization of two optical microresonator frequency combs coupled over distances larger than 20 metres is experimentally realized, opening up applications of microresonator combs and offering a chip-based photonic platform for exploring complex nonlinear systems.

    • Jae K. Jang
    • , Alexander Klenner
    • , Xingchen Ji
    • , Yoshitomo Okawachi
    • , Michal Lipson
    •  & Alexander L. Gaeta
  • Article |

    A broadband multi-frequency Fabry–Pérot laser diode, when coupled to a high-Q microresonator, can be efficiently transformed to an ~100 mW narrow-linewidth single-frequency light source, and subsequently, to a coherent soliton Kerr comb oscillator.

    • N. G. Pavlov
    • , S. Koptyaev
    • , G. V. Lihachev
    • , A. S. Voloshin
    • , A. S. Gorodnitskiy
    • , M. V. Ryabko
    • , S. V. Polonsky
    •  & M. L. Gorodetsky
  • Article |

    Up to three distinct frequency combs are simultaneously generated from an optical microresonator and a continuous-wave laser, enabling the deployment of dual- and triple-comb-based methods to applications unachievable by current technologies.

    • E. Lucas
    • , G. Lihachev
    • , R. Bouchand
    • , N. G. Pavlov
    • , A. S. Raja
    • , M. Karpov
    • , M. L. Gorodetsky
    •  & T. J. Kippenberg

Amendments & Corrections