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The researchers synthesize organicâinorganic hybrid inverse perovskites that exhibit excellent carrier lifetime and mobilityâlifetime product and high resistivity, enabling stable X-ray detectors with performance arguably outperforming state-of-the-art perovskite single-crystal detectors.
Highly twisted multi-boron-based multiple-resonance thermally activated delayed fluorescence emitters enable deep-blue organic light-emitting diodes with high colour purity, a narrow full-width at half-maximum of 14ânm and a peak external quantum efficiency of 39.2%.
Based on the acquisition of a multi-spectral reflection matrix at a high frame rate, a fully digital microscope overcomes aberrations and multiple scattering to provide a three-dimensional image of an ex vivo opaque cornea at a resolution of 0.29âμm and 0.5âμm in the transverse and axial directions, respectively.
A direct lead-halide perovskite CT imager has been demonstrated. The detector arrays have 980âμm absorber thickness and exhibit detection quantum efficiency of 80% and noise-equivalent dose of 153âpGyair.
Using electrostatic doping, the real and imaginary parts of the refractive index along the extraordinary axis of semiconducting, highly aligned, single-walled carbon nanotubes over 4â³ wafers can be tuned by up to 5.9% and 14.3% in the infrared at 2,200ânm and 1,660ânm, respectively.
The concept of chiral topological lightâa polychromatic light with chiral closed 3D polarization trajectories, space-varying with the azimuthal angleâis introduced and used for efficient sensing in chiral molecules, showcasing an example of successful application of topological concepts in optics.
Photon BoseâEinstein condensation is observed in a semiconductor laser, where thermalization and condensation of photons occur using an InGaAs quantum well and an open microcavity. The distinction between regimes of photon BoseâEinstein condensation and conventional lasing are clearly identified.
BoseâEinstein condensation of photons is demonstrated in a large-aperture electrically driven InGaAs vertical-cavity surface-emitting laser diode at room temperature. The observed photon BoseâEinstein condensate exhibits the fundamental transversal optical mode at a critical phase-space density.
Researchers demonstrate a receiver based on an all-Si eight-channel avalanche photodiode, which operates at a data rate of 160âGbâsâ1 per channel and has an aggregate rate of 1.28âTbâsâ1.
A two-dimensional van der Waals material, NbOCl2, that simultaneously exhibits near-unity linear dichroism (~99%) over 100ânm bandwidth in ultraviolet regime and large birefringence (0.26â0.46) within a wide visibleânear-infrared transparency window is reported.
Graded-energy-gap lead sulfide/mercury telluride stacked quantum dots enable photodetection and imaging in a focal plane array configuration from the visible (0.4âµm) to the mid-wave infrared (about 5âµm) region.
Researchers have achieved AND, OR and NOT gates, using localized exciton polaritons at room temperature. The logic is based on temporal gates, rather than relying on the usual spatial propagation approaches.
The integration of a single-photon detector array and imaging scanning microscopy in a confocal scanning microscope enables doubling the resolution of single-molecule localization microscopy.
Transfer printing of a quantum dotâZnO film with a surface-functionalized viscoelastic stamp enables the realization of RGB QLED pixels with a resolution of 2,500âpixels per inch and a peak external quantum efficiency of 23.3% for green-emitting devices.
An optical accelerator is designed to leverage a multiple-scattering cavity to passively induce optical nonlinear random mapping with a continuous-wave laser at a constant low power (~21âmW), providing a new avenue for optical computing.
Theoretically predicted in 1979, hyper-Raman optical activity is now experimentally observed through chirality conferral from the electromagnetic field of chiral plasmonic gold nanohelices to crystal violet molecules that are achiral, sparking new science at the organicâinorganic interface.
Multiple scattering capable of synthesizing programmable linear and nonlinear transformations concurrently at low optical power in the order of milliwatts continuous-wave power for optical computing is demonstrated, paving the way for ultra-efficient, low-power all-optical neural networks.
The researchers improve the properties of halide perovskite for high-performance X-ray detection by edge-defined film-fed crystal growth. In particular, high resistivity, low trap density, suppressed ion migration and reduced leakage current are demonstrated. They enable detectors with an extremely low detection limit and high sensitivity.
Transient visible-pump terahertz-probe near-field microscopy enables the simultaneous retrieval of the local chemical composition, crystallographic structure, topography and out-of-plane charge-carrier diffusion in perovskite films.