Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Exploiting the low spatial coherence of specifically designed random lasers, researchers demonstrate speckle-free full-field imaging in the regime of intense optical scattering. Their results show that the quality of images generated from random-laser illumination is superior to those generated from spatially coherent illumination.
By illuminating a sample with several uncontrolled random speckles and implementing a blind structured illumination microscopy algorithm, researchers demonstrate that image reconstruction can be achieved without knowing the original illumination pattern, at a resolution two times better than that of conventional wide-field microscopy.
Scientists demonstrate a Compton-based electromagnetic source based on a laser-plasma accelerator and a plasma mirror. The source generates a broadband spectrum of X-rays and is 10,000 times brighter than Compton X-ray sources based on conventional accelerators.
By combining high-resolution nonlinear optical microscopy with few-cycle time resolution, scientists show that they are able to probe the spatiotemporal localization of light waves in random dielectric nanostructures. The findings will aid the study of light localization dynamics in a variety of passive and active random media.
Researchers demonstrate single-photon generation by electrical excitation from a single neutral nitrogen–vacancy centre in a p–i–n diamond diode. The photon generation rate at room temperature was 4 × 104 photons s−1 for an injection current of 14 mA. The researchers also investigated the carrier recombination dynamics of the device.
Scientists show that irradiating a double-foil target with intense few-cycle laser pulses can produce single half-cycle 50 as pulses with peak electric fields as high as 1013 V m−1 and pulse energies of up to 0.1 mJ. The findings may stimulate new types of attosecond pump–probe experiments.
Researchers realize a zero-angular-momentum radial-emission laser by filling a cylindrical photonic crystal fibre cavity with a microfluidic gain medium. Control of the electromagnetic fields is provided by electrically contacted and independently addressable liquid-crystal microchannels in the fibre.
Researchers observe heralded entanglement between two neodymium ensembles doped in Nd3+:Y2SiO5 crystals separated by 1.3 cm. The high level of interference indicates that the stored entanglement does not significantly decohere over a period of 33 ns. They demonstrate that rare-earth-ion ensembles have the potential to form compact, stable and coherent quantum network nodes.
By exciting few-cycle femtosecond laser pulses at 397 nm in near-resonance with the direct bandgap of silicon, researchers experimentally demonstrate coherent phonon generation in silicon at a fundamental frequency of 15.6 THz and all-optical >100 THz frequency comb generation.
Researchers demonstrate that an individual Mollow sideband channel of the resonance fluorescence from an InGaAs quantum dot can act as an efficient single-photon source. The central frequency of the bright and narrow sideband emission can be changed by laser detuning over a range spanning 15 times the emission linewidth.
By applying catastrophe theory to high-harmonic generation, researchers identify caustics relating to regions of spectral focusing and greatly enhanced field intensity.
Researchers demonstrate the creation of an eight-photon Schrödinger-cat state with genuine multipartite entanglement by developing noise-reduction multiphoton interferometer and post-selection detection. The ability to control eight individual photons will enable new multiphoton entanglement experiments in previously inaccessible parameter regimes.
Fabricating doped semiconductor layers and p–n junctions inside silica optical fibres allows the realization of a new breed of in-fibre optoelectronic devices, such as photodetectors with gigahertz bandwidths.
Scientists report a record-low integrated timing error of less than 13 as between phase-locked optical pulse trains emitted from two, nearly identical 10 fs Ti:sapphire lasers. The uniform pulse trains will enable many measurements based on the synchronization of pump–probe experiments.
Researchers use an X-ray pump beam to change GaAs from absorbing to nearly transparent in less than 100 ps for laser photon energies just above the bandgap. They also demonstrate the opposite effect — X-ray-induced optical opacity — for photon energies just below the bandgap.
By replacing conventional indium tin oxide (ITO) anodes with high-work-function, low-sheet-resistance graphene anodes, researchers demonstrate flexible fluorescent organic LEDs with extremely high luminous efficiencies of 37.2 lm W–1 for fluorescent devices and 102.7 lm W–1 for phosphorescent devices. These values are significantly higher than those of optimized organic LEDs based on ITO anodes.
