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  • The interaction of terahertz waves with novel materials is bringing rich physics and new opportunities for applications.

    • Oliver Graydon
    Meeting Report
  • Precise measurements of the length of an Earth day are essential for understanding global mass transport phenomena. A ring laser gyroscope provides absolute measurements of variations in the length of the day with a resolution of 5 parts per billion over a 14-day period.

    • Caterina Ciminelli
    • Giuseppe Brunetti
    News & Views
  • Time reflection and refraction are experimentally observed in ultracold atoms. To this end, the time boundary is formed by imposing an abrupt change in the coupling strength of the atomic chain. Time boundary effects are robust against material disorder.

    • Zhaoli Dong
    • Hang Li
    • Bo Yan
  • Mansoor Sheik-Bahae, an exceptionally inventive scientist who made important contributions to nonlinear optics, optical refrigeration and laser science, passed away in July 2023, aged 67. He will be cherished for his sharp intellect, good humour, warm heart and the scientific legacy he leaves.

    • Richard Epstein
    • Denis Seletskiy
    • Eric Van Stryland
  • Activity in using photonics for subsea wireless communications and power generation is starting to make waves.

  • The laser community returned to Prague to celebrate science and to be connected, in person, again, while high-power lasers were in the limelight.

    • Rachel Won
    Meeting Report
  • A diffractive axicon (a device that diffracts the input light pulse radially) enables complex correlations between the topological charges and the frequencies of ultrashort laser pulses, resulting in a variety of ultrashort coiled light structures.

    • Spencer W. Jolly
    News & Views
  • Researchers have developed efficient electro-optic tools for manipulating the time and frequency of single photons by taking inspiration from Fresnel lenses.

    • John M. Donohue
    News & Views
  • The introduction of a two-step deconvolution workflow maximizes the detection of fluorescence in fluctuation-based super-resolution imaging, enabling a square millimetre field of view to be captured in as little as ten minutes.

    • David Baddeley
    News & Views
  • Researchers demonstrated coherent dissipative Kerr solitons with a conversion efficiency exceeding 50% and good line spacing stability. The results may facilitate practical implementation of a scalable integrated photonic architecture for energy-efficient applications.

    • Óskar B. Helgason
    • Marcello Girardi
    • Victor Torres-Company
    ArticleOpen Access
  • The authors discuss the opportunities and challenges facing underwater photovoltaics.

    • Jason A. Röhr
    • B. Edward Sartor
    • André D. Taylor
  • Detecting the vibrations of individual molecules directly in the mid-infrared regime is hindered by thermal noise. Here researchers bypass conventional detectors and upconvert the mid-infrared photons into visible light using molecular bonds, yielding an optical readout for single-molecule vibrational spectroscopy.

    • Rohit Chikkaraddy
    • Rakesh Arul
    • Jeremy J. Baumberg
    ArticleOpen Access
  • Attosecond transient reflectivity spectroscopy, in combination with extensive time-dependent density functional theory calculations, is used to study field-driven carrier injection in germanium in the time window of few femtoseconds around pulse overlap, paving a route towards achieving full optical control over charge carriers in semiconductors.

    • Giacomo Inzani
    • Lyudmyla Adamska
    • Matteo Lucchini