Latest Research

  • Article |

    Based on a modified Mie scattering theory, several pathways to achieve control over the directionality, polarization state and spectral emission that rely on a coherent coupling of an emitting dipole in monolayer MoS2 to optical resonances of a silicon nanowire are reported.

    • Ahmet Fatih Cihan
    • , Alberto G. Curto
    • , Søren Raza
    • , Pieter G. Kik
    •  & Mark L. Brongersma
  • Article |

    Lanthanide-doped upconverting nanoparticles exhibiting a 33,000 times increase in brightness and a 100 times increase in efficiency over bare upconverting nanoparticles are demonstrated. The findings are relevant in fields from solar energy to biophotonics.

    • David J. Garfield
    • , Nicholas J. Borys
    • , Samia M. Hamed
    • , Nicole A. Torquato
    • , Cheryl A. Tajon
    • , Bining Tian
    • , Brian Shevitski
    • , Edward S. Barnard
    • , Yung Doug Suh
    • , Shaul Aloni
    • , Jeffrey B. Neaton
    • , Emory M. Chan
    • , Bruce E. Cohen
    •  & P. James Schuck
  • Article |

    Circularly polarized isolated extreme-ultraviolet pulses are generated by exploiting non-collinear high- harmonic generation driven by two counter-rotating few-cycle laser beams. The numerical simulation predicts a linear chirp of 330 attoseconds.

    • Pei-Chi Huang
    • , Carlos Hernández-García
    • , Jen-Ting Huang
    • , Po-Yao Huang
    • , Chih-Hsuan Lu
    • , Laura Rego
    • , Daniel D. Hickstein
    • , Jennifer L. Ellis
    • , Agnieszka Jaron-Becker
    • , Andreas Becker
    • , Shang-Da Yang
    • , Charles G. Durfee
    • , Luis Plaja
    • , Henry C. Kapteyn
    • , Margaret M. Murnane
    • , A. H. Kung
    •  & Ming-Chang Chen
  • Article |

    The Bloch–Siegert shift—a strong-field phenomenon that implies a failure of the rotating-wave approximation—is observed in the polariton dispersion diagram of a two-dimensional electron gas system inside a high-Q terahertz photonic crystal cavity.

    • Xinwei Li
    • , Motoaki Bamba
    • , Qi Zhang
    • , Saeed Fallahi
    • , Geoff C. Gardner
    • , Weilu Gao
    • , Minhan Lou
    • , Katsumasa Yoshioka
    • , Michael J. Manfra
    •  & Junichiro Kono
  • Letter |

    The generation of gamma-ray flashes by dense ultra-relativistic electron beams travelling across a millimetre-thickness solid conductor is theoretically investigated. Peak brilliance above 1025 photons s−1 mrad−2 mm−2 per 0.1% bandwidth is expected.

    • Alberto Benedetti
    • , Matteo Tamburini
    •  & Christoph H. Keitel
  • Article |

    The direct generation of mid-infrared optical frequency combs in the region 2.5–4.0 μm from a 1.55-μm conventional and compact erbium-fibre-based femtosecond laser is demonstrated via coherent dispersive wave generation in silicon nitride nanophotonic waveguides.

    • Hairun Guo
    • , Clemens Herkommer
    • , Adrien Billat
    • , Davide Grassani
    • , Chuankun Zhang
    • , Martin H. P. Pfeiffer
    • , Wenle Weng
    • , Camille-Sophie Brès
    •  & Tobias J. Kippenberg
  • Article |

    Biodegradable cellulose-based photonic and plasmonic architectures are fabricated via soft nanoimprinting lithography, and are used for structural colour generation, photoluminescence enhancement and as disposable surface-enhanced Raman scattering substrates.

    • André Espinha
    • , Camilla Dore
    • , Cristiano Matricardi
    • , Maria Isabel Alonso
    • , Alejandro R. Goñi
    •  & Agustín Mihi
  • Article |

    By sending few-microjoule single-cycle terahertz pulses to a segmented terahertz electron accelerator and manipulator, 70 MV m–1 peak acceleration fields, 2 kT m–1 focusing gradients, 140 µrad fs–1 streaking gradient and bunch compression to 100 fs are achieved.

    • Dongfang Zhang
    • , Arya Fallahi
    • , Michael Hemmer
    • , Xiaojun Wu
    • , Moein Fakhari
    • , Yi Hua
    • , Huseyin Cankaya
    • , Anne-Laure Calendron
    • , Luis E. Zapata
    • , Nicholas H. Matlis
    •  & Franz X. Kärtner
  • Article |

    The Fermi–Pasta–Ulam recurrence process—the recovery of the initial state of a nonlinear system after a certain time—is observed for the first time in a low-loss optical fibre by building a multi-channel, vector optical-time-domain reflectometer.

    • Arnaud Mussot
    • , Corentin Naveau
    • , Matteo Conforti
    • , Alexandre Kudlinski
    • , Francois Copie
    • , Pascal Szriftgiser
    •  & Stefano Trillo
  • Article |

    By exploiting two-photon laser lithography for in situ printing of facet-attached beam-shaping elements, hybrid photonic integration can now be realized, opening opportunities for the automated assembly of photonic multi-chip systems with unprecedented performance and versatility.

    • P.-I. Dietrich
    • , M. Blaicher
    • , I. Reuter
    • , M. Billah
    • , T. Hoose
    • , A. Hofmann
    • , C. Caer
    • , R. Dangel
    • , B. Offrein
    • , U. Troppenz
    • , M. Moehrle
    • , W. Freude
    •  & C. Koos
  • Letter |

    A highly nonlinear optical response can be used to time-resolve light-induced phase transitions with few-femtosecond to sub-femtosecond accuracy, paving the way for time-resolving highly correlated many-body dynamics in strongly correlated systems with few-femtosecond accuracy.

    • R. E. F. Silva
    • , Igor V. Blinov
    • , Alexey N. Rubtsov
    • , O. Smirnova
    •  & M. Ivanov
  • Article |

    Heating due to optical losses in metal nanoparticles, which is usually an unwanted side effect, is harnessed to realize low-power opto-thermoelectric nanotweezers.

    • Linhan Lin
    • , Mingsong Wang
    • , Xiaolei Peng
    • , Emanuel N. Lissek
    • , Zhangming Mao
    • , Leonardo Scarabelli
    • , Emily Adkins
    • , Sahin Coskun
    • , Husnu Emrah Unalan
    • , Brian A. Korgel
    • , Luis M. Liz-Marzán
    • , Ernst-Ludwig Florin
    •  & Yuebing Zheng
  • Article |

    The use of a time-gated reflection matrix of a scattering medium, in particular via using singular value decomposition and injecting light into the largest time-gated eigenchannel, can lead to a more than tenfold enhancement in light energy delivery in comparison with ordinary wave diffusion cases.

    • Seungwon Jeong
    • , Ye-Ryoung Lee
    • , Wonjun Choi
    • , Sungsam Kang
    • , Jin Hee Hong
    • , Jin-Sung Park
    • , Yong-Sik Lim
    • , Hong-Gyu Park
    •  & Wonshik Choi
  • Article |

    By employing difference-frequency generation, a mid-infrared dual-comb spectrometer covering the 2.6 to 5.2 µm range is demonstrated with comb-tooth resolution, sub-MHz frequency precision and accuracy, and a spectral signal-to-noise ratio as high as 6,500.

    • Gabriel Ycas
    • , Fabrizio R. Giorgetta
    • , Esther Baumann
    • , Ian Coddington
    • , Daniel Herman
    • , Scott A. Diddams
    •  & Nathan R. Newbury
  • Article |

    Using silicon nitride waveguides processed by plasma-enhanced chemical vapour deposition, full integration of ultrahigh-Q resonators with other photonic devices is now possible, representing a critical advance for future photonic circuits and systems.

    • Ki Youl Yang
    • , Dong Yoon Oh
    • , Seung Hoon Lee
    • , Qi-Fan Yang
    • , Xu Yi
    • , Boqiang Shen
    • , Heming Wang
    •  & Kerry Vahala
  • Letter |

    By combining a chromatic focusing system with chirped laser pulses, the spatiotemporal distribution of the laser pulse is controlled in the focal region. The focal spot propagates over nearly 100 times its Rayleigh length at any velocity.

    • Dustin H. Froula
    • , David Turnbull
    • , Andrew S. Davies
    • , Terrance J. Kessler
    • , Dan Haberberger
    • , John P. Palastro
    • , Seung-Whan Bahk
    • , Ildar A. Begishev
    • , Robert Boni
    • , Sara Bucht
    • , Joseph Katz
    •  & Jessica L. Shaw
  • Article |

    Attosecond time–energy characterization of pulses generated by the Linac Coherent Light Source (LCLS) X-ray free-electron laser is enabled by angular streaking measurements.

    • N. Hartmann
    • , G. Hartmann
    • , R. Heider
    • , M. S. Wagner
    • , M. Ilchen
    • , J. Buck
    • , A. O. Lindahl
    • , C. Benko
    • , J. Grünert
    • , J. Krzywinski
    • , J. Liu
    • , A. A. Lutman
    • , A. Marinelli
    • , T. Maxwell
    • , A. A. Miahnahri
    • , S. P. Moeller
    • , M. Planas
    • , J. Robinson
    • , A. K. Kazansky
    • , N. M. Kabachnik
    • , J. Viefhaus
    • , T. Feurer
    • , R. Kienberger
    • , R. N. Coffee
    •  & W. Helml
  • Article |

    Green light-emitting diodes with a brightness of 460,000 cd m–2 and a low turn-on voltage of 2.5 V are enabled by the use of a chlorination treatment to provide conductive passivation of the devices.

    • Xiyan Li
    • , Yong-Biao Zhao
    • , Fengjia Fan
    • , Larissa Levina
    • , Min Liu
    • , Rafael Quintero-Bermudez
    • , Xiwen Gong
    • , Li Na Quan
    • , James Fan
    • , Zhenyu Yang
    • , Sjoerd Hoogland
    • , Oleksandr Voznyy
    • , Zheng-Hong Lu
    •  & Edward H. Sargent