In memory of Gabriel Popescu

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In memory of Gabriel Popescu

Nature Photonics, Published online: 15 August 2022; doi:10.1038/s41566-022-01056-1Gabriel Popescu passed away in June 2022. He will be remembered as a creative leader in biophotonics, with pioneering contributions to quantitative phase imaging and spectroscopy, an engaging collaborator and a dear friend.

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Sequential generation of multiphoton entanglement with a Rydberg superatom

Nature Photonics, Published online: 11 August 2022; doi:10.1038/s41566-022-01054-3Up to six photons in a Greenberger–Horne–Zeilinger state are sequentially generated by using a Rydberg superatom—a mesoscopic atomic ensemble under the condition of strong Rydberg blockade. The efficiency scaling factor for adding one photon is 0.27.

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Sequential generation of multiphoton entanglement with a Rydberg superatom

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Ultrastable near-infrared perovskite light-emitting diodes

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Sub-50-ns ultrafast upconversion luminescence of a rare-earth-doped nanoparticle

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Ultrafast energy exchange between two single Rydberg atoms on a nanosecond timescale

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Ultrastable near-infrared perovskite light-emitting diodes

Nature Photonics, Published online: 08 August 2022; doi:10.1038/s41566-022-01046-3Near-infrared perovskite light-emitting diodes with extrapolated device lifespans on the scale of years are achieved by the use of a dipolar molecular stabilizer.

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Sub-50-ns ultrafast upconversion luminescence of a rare-earth-doped nanoparticle

Nature Photonics, Published online: 08 August 2022; doi:10.1038/s41566-022-01051-6A tilted plasmonic nanocavity enables shortening of the luminescence decay time of a rare-earth-doped nanoparticle to sub-50 ns. High quantum efficiency enhancement, chiral polarization and directional far-field emission are maintained.

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Ultrafast energy exchange between two single Rydberg atoms on a nanosecond timescale

Nature Photonics, Published online: 08 August 2022; doi:10.1038/s41566-022-01047-2An array of 87Rb atoms with inter-atomic distances of 1.5 μm is prepared by holographic optical tweezers. When a pair of nearby 87Rb atoms is optically excited to a Rydberg state, the energy exchange between the atoms is observed on a timescale of nanoseconds.

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