Volume 18

  • No. 3 March 2024

    Quantum skyrmions

    Two-photon entangled states with a non-trivial topology are used to form quantum skyrmions that exhibit topological invariance.

    See Ornelas et al.

  • No. 2 February 2024

    Ultrafast dual-comb spectroscopy

    An artistic image of a dual-frequency comb that is generated by using an optical parametric oscillator to convert a pair of near-infrared combs into the mid-infrared. The generated combs enable nanosecond-timescale spectroscopy for probing the ultrafast dynamics found in supersonic gas jets, explosions and chemical kinetics.

    See Long et al.

  • No. 1 January 2024

    On-chip optical logic

    On-chip optoelectronic logic gates that operate in the telecom wavelength band are constructed by integrating multiple silicon waveguides with black phosphorus.

    See He et al.