Volume 12 Issue 4, April 2018

Volume 12 Issue 4

Attosecond X-ray analysis

Depiction of an ‘angular streaking’ scheme that enables the attosecond details of individual X-ray pulses to be read by a detector, akin to reading the face of a clock. Performed at the Linac Coherent Light Source in Stanford, US, ultrashort X-ray pulses photoionize neon while the circular polarization of an infrared laser field modulates the corresponding photoelectron energy and angle of the emission.

See Helml et al.

Image: Terry Anderson, SLAC National Accelerator Laboratory. Cover Design: Bethany Vukomanovic

Editorial

Books & Arts

Research Highlights

News & Views

  • News & Views |

    Observing ultrafast transient dynamics in optics is a challenging task. Two teams in Europe have now independently developed ‘optical oscilloscopes’ that can capture both amplitude and phase information of ultrafast optical signals. Their schemes yield new insights into the nonlinear physics that takes place inside optical fibres.

    • Cheng Lei
    •  & Keisuke Goda
  • News & Views |

    Optical trapping of metal nanoparticles with conventional ‘tweezers’ can be challenging due to absorption and heating. Now, an opto-thermoelectric trapping approach that exploits heating has been demonstrated.

    • Frank Cichos

Articles

  • 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 |

    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 |

    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 |

    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