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Dynamic resonance fluorescence spectra beyond the Mollow-triplet are observed in a In(Ga)As quantum dot in a micropillar. Multiple side peaks, excitation-induced spectral asymmetry, and cavity filtering effects are experimentally observed and theoretically reproduced by a full quantum model that includes phonon-induced decoherence.
Frequency-modulated terahertz continuous waves are generated from Josephson junctions included in a cuprate superconductor. When 3 GHz sinusoidal waves were superimposed on 840–890 GHz carrier waves, the modulation bandwidth reached 40 GHz when a Josephson plasma emission was utilized.
A switchable deprotonation reaction at the interface between the perovskite and electron-transporting layer enables bright deep-red perovskite LEDs emitting at 691 nm with a half-lifetime of about 50.3 h at 100 mA cm–2.
A skyrmion is a topologically stable field configuration. A non-local skyrmion, which has been hitherto elusive in condensed-matter physics, is realized by using entangled photons with a non-trivial topology. The connection between the notions of topology and entanglement is investigated, revealing topological invariance even when entanglement is fragile.
Ammonium bromide is shown to passivate deep traps on FAPbBr3 surfaces, improving the charge collection efficiency to near unity in perovskite gamma-ray devices. The approach yielded tenfold improvements in dark current, and the energy resolution of 137Cs spectra acquired using FAPbBr3 detectors was improved from 5.7% to 1.7%.
Nature Photonics spoke with Rüdiger Paschotta, the founder of RP Photonics, about his online encyclopedia of photonics, the motivation behind it and future plans for the project.
Acoustic modulation of atmospheric air enables the deflection of laser pulses with a peak power of 20 gigawatts, expanding the acousto-optics toolbox to high-power laser manipulation in ambient air.
With many exotic electromagnetic effects, metamaterials are now being exploited in real-world biomedical applications, with expected impacts in healthcare.
Controlling the intrinsic doping of lead-free perovskites enables near-infrared LEDs emitting at 948 nm with a peak radiance of 226 W sr–1 m–2 and a half-lifetime of 39.5 h.
Exploiting the signal correlation between multiple quantum sensors enables measuring overlapping signals from multiple targets, as demonstrated by imaging point defects in a diamond with an accuracy of 1.7 nm.
A terahertz focal-plane array based on a two-dimensional array of plasmonic photoconductive nanoantennas offers high-quality imaging in the terahertz region.
Electrically injected charges can effectively contribute to optical gain in perovskite light-emitting diodes under optical and electrical co-excitation.
Dipole–dipole interactions in mixed-phase CdZnSeS quantum dots enable the effective orientation of the quantum dots and improved photon out-coupling when employed in a light emitting diode.
Silver telluride quantum dots are employed in shortwave-infrared photodetectors and in monolithically integrated imagers that are free from toxic heavy metals and fully solution processable.