Our panel of editors reviewed 125 research summaries from scientists from around the world. They selected for publication 30 stories that they felt most clearly communicated breakthroughs of interest to the optics community. Some of the summaries have related multimedia that you can access using the links below. Thanks to all who submitted summaries as well as to our panel of guest editors: Robert D. Guenther, the panel chair, and guest editors Svetlana Boriskina, Mihaela Dinu, Dmitry Dylov, Alexandre Fong, Andrew Forbes, G. Groot Gregory, Arlene Smith and Stephen R. Wilk.

Metamaterials

Quantum Computing

Multiphoton boson sampling; deterministic single-photon sources in 2-D semiconductors

Lasers

Optical Communications

Ultrafast laser-written devices; magnetic routing of light-induced waveguides; unscrambling light on a photonic chip; nanopillar LEDs in III–V/silicon

Imaging

Entangled Light

Blurring the classical-quantum divide; on-chip entangled quDit states

Particle Diagnostics

Bio-Optics

Repairing blood vessel problems with light; electro-active optical waveguides for flu detection; imaging biological-cell forces; waveguides made of bacteria

Guided Waves

Imaging

Dual-axis OCT; super-resolution photoacoustics; subwavelength EUV imaging; real-time imaging of ferroelectric domain growth; scatter-plate microscopy

Microscopy

Nanophotonics

Meta-optics in high-index dielectrics; molecular nano­photonics; hard-X-ray magnetic tomography; holographic optical nanoparticle manipulation

Optomechanics

Nonlinear Optics

Field-induced nonlinearities in silicon; OPA gains in ultra-silicon-rich nitride; Weyl points in optics

Beam Shaping and Optical Control

Photon Statistics

Tuning photon bunching in disordered lattices

Ultrafast Optics

Photonic Structures

Mirrorless Fano laser; 3-D topological photonics; light concentration in a dielectric cavity

Nano-Optics

Lasers

Capillary-wave lasers

Mathematical Photonics

Spectroscopy

Multidimensional dual-comb spectroscopy