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  • Following first lasing at LCLS-II — a coherent X-ray laser source driven by a 700-m superconducting linear accelerator — several upgrades are already in the works. Nature Photonics spoke to LCLS director Mike Dunne about LCLS-II commissioning hurdles as well as future plans.

    • David Pile
    Q&A
  • Global proliferation of free-electron laser X-ray sources has improved accessibility. Now the race is on for high repetition rates, attosecond pulses, and full coherence.

    Editorial
  • We had all been wondering “where is Costas?” and now we learned that we shall not see him again. We have lost a good friend and leader in the photonics community.

    • Maria Kafesaki
    • Thomas Koschny
    • Martin Wegener
    Obituary
  • Andrew M. Weiner, a luminary in ultrafast optics and quantum photonics passed away on February 13, 2024, at the age of 65. He will be remembered for his profound contributions to the optics and photonics community, engineering, education, and for his devoted mentorship. He leaves behind a legacy of innovation and inspiration.

    • Jason D. McKinney
    • Joseph M. Lukens
    • Vladimir M. Shalaev
    Obituary
  • A ring laser gyroscope, located at the Geodetic Observatory Wettzell in Southern Germany, measures variations in the Earth’s rotation. Nature Photonics spoke to a key researcher on the project, Ulrich Schreiber, about the system’s birth, teething issues, and how it may one day probe the El Niño effect.

    • David Pile
    Q&A
  • Nature Photonics spoke with Rüdiger Paschotta, the founder of RP Photonics, about his online encyclopedia of photonics, the motivation behind it and future plans for the project.

    • Giampaolo Pitruzzello
    Q&A
  • Photonic processors are promising candidates for solving tough mathematical problems. Nature Photonics asked Yoshihisa Yamamoto, director of the Physics and Informatics Laboratories at NTT Research in USA, about the progress that is being made in realizing coherent Ising machines (CIMs).

    • Noriaki Horiuchi
    Q&A
  • Vladimir Zakharov was a man of a strong passion and grand intellect, who was equally and deservedly proud of both his scientific achievements and his poetry.

    • G. E. Falkovich
    • E. A. Kuznetsov
    • S. K. Turitsyn
    Obituary
  • We posit that inconsistent interpretations of experimental data have led to inaccurate claims on metalens focusing efficiencies. By performing a meta-analysis, we show that extraordinary claims of high focusing efficiency at high numerical apertures are, unfortunately, not yet backed by rigorous simulation or experimental results.

    • Rajesh Menon
    • Berardi Sensale-Rodriguez
    Comment
  • Allen Weeks, Director General of the Extreme Light Infrastructure European Research Infrastructure Consortium, talks to Nature Photonics about the founding and future of the high-power-laser facilities, and stimulating a resurgence of physics in new EU member countries.

    • David Pile
    Q&A
  • Light sheet microscopy offers rapid 3D imaging of biological specimens while limiting photodamage. Nature Photonics spoke with Elizabeth Hillman of Columbia University about its capabilities, promising applications and present limitations.

    • Giampaolo Pitruzzello
    Q&A
  • 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
    Obituary
  • Activity in using photonics for subsea wireless communications and power generation is starting to make waves.

    Editorial
  • Optics is now going beneath the waves to give remote-operated vehicles and divers fast optical wireless data links. Nature Photonics spoke with Boon Ooi from KAUST, a leading researcher into underwater photonics research.

    • Oliver Graydon
    Q&A
  • Nature Photonics spoke to Hongjie Dai from Stanford University about bioimaging in the second near-infrared (NIR-II) spectral window and its clinical potential.

    • Giampaolo Pitruzzello
    Q&A
  • In recent decades, progress in developing better nonlinear materials has not been as rapid as wished. Here I propose that this may be explained by considering the simple view of nonlinear optical phenomena as being determined mostly by the length of interaction time between photons and matter. Tentative routes towards improvements in the efficiency of nonlinear optical phenomena are suggested.

    • Jacob B. Khurgin
    Comment