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Greatly enhanced light absorption is reported in large perovskite quantum dots by realizing a transition with a giant oscillator strength at the optical bandgap.
Cross-polarized stimulated Brillouin scattering and its integration with quadratic nonlinearity is studied in lithium niobate, which enhanced photonic device performance in a reconfigurable stimulated Brillouin laser with 0.7-Hz narrow linewidth and 40-nm tunability, an efficient coherent mode converter, and Brillouin-quadratic laser and frequency comb operational in near-infrared and visible bands.
Phonon polariton quasi-bound states in the continuum realized in a dielectric metasurface patterned with a subwavelength lattice of elliptical holes in a commercially available free-standing, large-area 100-nm-thick silicon carbide membrane is demonstrated, attractive for applications in mid-infrared optics, such as molecular sensing and thermal radiation engineering.
Holmium doping endows upconversion nanoparticles with a dual-reservoir-level mechanism for parallel photon avalanche emission, enabling tunable chromaticity at room temperature, nonlinearity index up to 22 and spatial resolution for multicolour biological imaging down to 78 nm.
Intense squeezed light with focusable intensities of 0.1 TW cm−2 is created by propagating a classical, intense and noisy input beam through an optical fibre. The noise 4 dB below the shot-noise level is achieved by selecting a set of wavelengths whose intensity fluctuations are maximally anticorrelated.
When high-harmonic emission from a ZnO crystal is perturbed with a bright squeezed vacuum beam, a comb of super-bunched high-order sidebands is created. This indicates photon bunching and the generation of a non-coherent state at the short wavelength.
An acceptor–donor–acceptor organic semiconductor enables near-infrared organic light-emitting diodes with reduced efficiency roll-off over six orders of magnitude of excitation current density, enabling a maximum luminance of 2,000 W sr−1 m−2.
Electrochemical modulation of fluorophores enables regulating their emission states, facilitating spectral unmixing of up to four fluorophores with similar spectral characteristics. This method is readily applicable to multicolour STED imaging, effectively expanding a single imaging channel to four channels.
A laser design that exploits multiple bound states on a flat band to tightly confine light in three dimensions yields an ultracompact terahertz quantum cascade laser cavity with a lateral size of ~3λ.
Field-programmable photonic nonlinearity is realized by controlling the spatial distribution of carrier excitations and their dynamic behaviour within an active semiconductor, advancing photonic computing and its integration with reconfigurable computing architectures.
Light sheet microscopy with curved light sheets enables tiling-free imaging of an entire intact cleared mouse brain with lateral and axial spatial resolutions of 1.0 μm and 2.5 μm, respectively, in less than 3 h.
Combining space topology and time topology, topological states that are localized simultaneously in space and time are theoretically and experimentally demonstrated, potentially enabling the space-time topological shaping of light waves with applications in spatiotemporal wave control for imaging, communications and topological lasers.
By integrating a moiré photonic structure on-chip with advanced microelectromechanical system (MEMS) technology, an in situ twisted moiré photonic platform that can be tuned is realized, enabling nanometre-scale positioning of two optical nanostructures in either the near- or far-field coupling regime.
Ultrafast magnetic field steps are generated by light-induced quenching of supercurrents in a YBa2Cu3O7 superconductor. They exhibit millitesla amplitude, picosecond rise times and slew rates approaching 1 GT s–1.
A systematic study of 15 non-fullerene-based organic solar cells elucidates loss mechanisms and enables an encapsulated device to retain 91% of its initial efficiency after seven months of outdoor operation in Saudi Arabian climate.
Dense three-dimensional integration of photonics and electronics results in a high-speed (800 Gb s−1) data interface for semiconductor chips that features 80 communication channels and consumes only tens of femtojoules per transmitted bit.
Guiding light around dynamic regions of a scattering object by means of propagating light through the most ‘stable’ channel within a moving scattering medium is demonstrated, potentially advancing fields such as deep imaging in living biological tissue and optical communications through turbulent air and underwater.
Nonlinear optical properties of transparent conducting oxides are explored through the full spatio-spectral fission of an ultrafast 93-fs pulse traversing a submicrometre time-varying aluminium zinc oxide layer in its near-zero-index region, providing insights into the use of these materials for integrated photonics, photonic time crystals and integrated neural networks.
Using a grating-based mode-splitting and reflector approach, a bidirectional chip-scale nanophotonic Kerr-resonator circuit that consumes 97% of the pump power to generate a soliton frequency comb at approaching unit efficiency with 65% conversion efficiency is reported.
