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The researchers synthesize organic–inorganic hybrid inverse perovskites that exhibit excellent carrier lifetime and mobility–lifetime 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 14 nm 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 0.29 μm and 0.5 μm in the transverse and axial directions, respectively.
A direct lead-halide perovskite CT imager has been demonstrated. The detector arrays have 980 μm absorber thickness and exhibit detection quantum efficiency of 80% and noise-equivalent dose of 153 pGyair.
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 4″ wafers can be tuned by up to 5.9% and 14.3% in the infrared at 2,200 nm and 1,660 nm, respectively.
The concept of chiral topological light—a polychromatic light with chiral closed 3D polarization trajectories, space-varying with the azimuthal angle—is introduced and used for efficient sensing in chiral molecules, showcasing an example of successful application of topological concepts in optics.
Photon Bose–Einstein 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 Bose–Einstein condensation and conventional lasing are clearly identified.
Bose–Einstein condensation of photons is demonstrated in a large-aperture electrically driven InGaAs vertical-cavity surface-emitting laser diode at room temperature. The observed photon Bose–Einstein 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 160 Gb s−1 per channel and has an aggregate rate of 1.28 Tb s−1.
A two-dimensional van der Waals material, NbOCl2, that simultaneously exhibits near-unity linear dichroism (~99%) over 100 nm bandwidth in ultraviolet regime and large birefringence (0.26–0.46) within a wide visible–near-infrared transparency window is reported.
Precise control over doping levels and displacement fields enables the observation of a notable blueshift in the Fermi polaron resonance in trilayer tungsten diselenide. This result highlights the promise of two-dimensional materials for advanced nonlinear optical applications with high tunability.
Joseph Izatt’s work advanced the science of imaging in biophotonics and brought optical coherence tomography imaging to the eye care of infants and children and, as live feedback for the surgeon, to ophthalmic microsurgery.
A plasmonic platform and a dual gate are integrated in a single-photon emitter made of two-dimensional materials. The combination enables engineered radiative and nonradiative decays, leading to a device quantum efficiency of up to 90%.
By exploiting nonlinear feedback arising from the interaction of ultrafast laser pulses, self-organized nanolines that appear to defy the limits of diffraction are shown to cut, dice, and structure optical materials, fabricating true zero-order sapphire waveplates and crystalline micro-prisms.
Although three-dimensional laser nanofabrication has become an established and widespread technology, research towards achieving higher resolutions, higher speeds, lower costs, mass production, more material availability and more functionality for this technology continues.