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Perovskite crystals are shown to be highly efficient materials for optical refrigeration, supporting cooling of up to 58 K when exposed to laser light.
A metasurface composed of pixels of optically switchable phase change material yields a photonic platform that can be configured on demand to perform a variety of optical tasks.
Scientists theoretically show infrared to X-ray sources that can be implemented on-chip by scattering high-energy electrons with graphene plasmons and predict that they are capable of producing tunable radiation.
A 256 × 256 pixel scintillator-based X-ray detector that improves resolution by limiting optical cross-talk is made using terbium-doped gadolinium oxysulfide scintillator particles in an organic photodetector matrix.
A round-robin differential phase shift protocol, in which monitoring of the signal disturbance is unnecessary, has been experimentally realized. With 65 pulses in each packet, the system can distribute a secret key over a distance of 90 km.
Scientists demonstrate an optically pumped InP-based distributed feedback laser array monolithically grown on (001)-silicon operating at room temperature that is suitable for wavelength-division multiplexing applications.
A diffractive dielectric grid placed between the anode and substrate of an organic light-emitting device is found to significantly enhance the extraction of light.
A protocol to recover states of optical continuous-variable entanglement is developed based on approximate heralded noiseless amplification. The degraded entanglement is completely recovered no matter how significant these losses are.
Scientists have demonstrated non-collinear circularly polarized high-harmonic generation and showed that this method generates bright circularly polarized extreme-ultraviolet beams with both left and right helicity simultaneously.
A proof-of-principle quantum key distribution experiment based on the round-robin differential phase shift protocol is demonstrated. Using a coherent wave-packet containing five pulses, the quantum keys were distributed over up to 30 km of fibre.
Photodiodes with an intrinsic narrow spectral response make it possible to discriminate between red, green and blue light without the need for any optical filters.
Perovskite-based devices typically exhibit broadband spectral responses. Here narrowband (< 20 nm FWHM) response is achieved for a photodetector application.
A quantum simulation scheme is proposed for molecular vibronic spectra, a problem for which no efficient classical algorithm is currently known. The simulation is efficiently performed on a boson sampling machine simply by modifying the input state.
The morphology of perovskites, a materials system of great interest for use in solar cells and other optoelectronic devices, is found to strongly modify their charge generation and transport properties.
Self-parametric amplification, a nonlinear optical effect, is observed in optical fibre and results in optical spectrum narrowing and stable propagation.