Photonic-circuit-integrated titanium:sapphire laser

Nature Photonics, Published online: 26 January 2023; doi:10.1038/s41566-022-01144-2A prototype integrated Ti:Sa laser is demonstrated by bonding the Ti:Sa gain medium on silicon nitride microring resonators. Lasing is demonstrated between 730 nm and 830 nm with a threshold power as low as 6.5 mW.

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Video-rate hyperspectral camera based on a CMOS-compatible random array of Fabry–Pérot filters

Nature Photonics, Published online: 23 January 2023; doi:10.1038/s41566-022-01141-5A hyperspectral camera based on a random array of CMOS-compatible Fabry–Pérot filters is demonstrated. The hyperspectral camera exhibits performance comparable with that of a typical RGB camera, with 45% sensitivity to visible light, a spatial resolution of 3 px for 3 dB...

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High-gain and high-speed wavefront shaping through scattering media

Nature Photonics, Published online: 23 January 2023; doi:10.1038/s41566-022-01142-4The combination of optical phase conjugation and light amplification enables wavefront shaping with simultaneously optimized operational speed, number of control degrees of freedom and energy of the focused wavefront. Shaping with a 10 μs latency time over about 106 control...

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Super-resolution imaging of non-fluorescent molecules by photothermal relaxation localization microscopy

Nature Photonics, Published online: 23 January 2023; doi:10.1038/s41566-022-01143-3Photothermal relaxation localization microscopy allows super-resolution imaging of non-fluorescent targets by leveraging spatial-dependent heat dissipation in photothermal microscopy. Individual lipid droplets and their distribution in living cells are imaged at spatial...

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The knight of holographic displays

Nature Photonics, Published online: 19 January 2023; doi:10.1038/s41566-022-01150-4Recollected by his colleagues as a creative and humble scholar with an indomitable will, Byoungho Lee was enthusiastic about realizing the holistic potential of holographic displays.

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Quantum recoil in free-electron interactions with atomic lattices

Nature Photonics, Published online: 19 January 2023; doi:10.1038/s41566-022-01132-6Quantum recoil is experimentally observed via photon energy shifts in Smith–Purcell radiation. Leveraging van der Waals materials as atomic-scale gratings, the quantum recoil is measured at room temperature on a tabletop platform.

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Laser-guided lightning

Nature Photonics, Published online: 16 January 2023; doi:10.1038/s41566-022-01139-zA terawatt laser filament is shown to be able to guide lightning over a distance of 50 m in field trials on the Säntis mountain in the Swiss Alps.

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Artificial confocal microscopy for deep label-free imaging

Nature Photonics, Published online: 12 January 2023; doi:10.1038/s41566-022-01140-6A laser scanning microscope equipped with quantitative phase imaging is trained with a neural network to perform artificial confocal microscopy

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Attosecond coherent control of electronic wave packets in two-colour photoionization using a novel timing tool for seeded free-electron laser

Nature Photonics, Published online: 12 January 2023; doi:10.1038/s41566-022-01127-3Relative synchronization between free-electron laser pulses and a near-infrared field fields is achieved with 24 as resolution by using a correlation analysis of single-shot photoelectron spectra. It is applied to coherently control the photoionization process in neon...

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An efficient solid-solution crystalline organic light-emitting diode with deep-blue emission

Nature Photonics, Published online: 12 January 2023; doi:10.1038/s41566-022-01138-0A thin-film of crystalline organic semiconductors yields a bright, efficient deep-blue OLED.

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