Generating optical vortex beams by momentum-space polarization vortices centred at bound states in the continuum

Nature Photonics, Published online: 06 July 2020; doi:10.1038/s41566-020-0658-1Optical vortices can be generated by applying the winding behaviour of resonances in the momentum space of a photonic crystal slab, which naturally exists and is associated with bound states in the continuum, to modify the phase front of a beam.

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Phase-locked laser-wakefield electron acceleration

Nature Photonics, Published online: 06 July 2020; doi:10.1038/s41566-020-0657-2Independent velocity and intensity control of photons for driving a laser-plasma accelerator may enable a dephasing-free regime.

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Generating optical vortex beams by momentum-space polarization vortices centred at bound states in the continuum

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Phase-locked laser-wakefield electron acceleration

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Overcoming the energy gap law in near-infrared OLEDs by exciton–vibration decoupling

Nature Photonics, Published online: 29 June 2020; doi:10.1038/s41566-020-0653-6Pt(ii) complexes allow the fabrication of efficient near-infrared organic light-emitting diodes that operate beyond the 900 nm region.

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Overcoming the energy gap law in near-infrared OLEDs by exciton–vibration decoupling

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Super-resolution microscopy on a photonic chip

Nature Photonics, Published online: 26 June 2020; doi:10.1038/s41566-020-0656-3Using a photonic chip to generate the patterns of light needed for structured illumination microscopy could reduce the cost and complexity of super-resolution imaging.

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Plants glow as they grow

Nature Photonics, Published online: 26 June 2020; doi:10.1038/s41566-020-0661-6Plants glow as they grow

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Metalenses go atomically thick and tunable

Nature Photonics, Published online: 26 June 2020; doi:10.1038/s41566-020-0648-3By utilizing exciton resonances in atomically thick semiconductors, researchers have now demonstrated the ultimate downscaling of optical lenses and reported on their efficacious electrical tunability.

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Refracting spacetime wave packets

Nature Photonics, Published online: 26 June 2020; doi:10.1038/s41566-020-0652-7A particular class of focused, pulsed light beams can propagate self-similarly in free space at a fixed group velocity. Now, scientists present a law of refraction that determines how the group velocity of these beams changes as they refract at an interface between two materials.

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