Articles tagged with Optics
A new OAM-STM architecture enables 3-bit data transmission at ultrafast pulse rates, combining spatial separation with time decoding for improved scalability. The system achieves GHz-level transmission rates without electronic signal processing, enabling more compact high-speed systems.
The latest advancements in photomedicine, materials science, and soft electronics are driving the development of next-generation phototherapy devices. These innovations include wearable and implantable flexible sensing technologies combined with AI, enabling closed-loop systems for real-time adjustments and improved medical outcomes.
Researchers developed a snake-inspired system that bridges the gap between infrared and visible light using CMOS sensors. The innovation integrates an upconverter directly onto the sensor, enabling 4K ultra-high-resolution imaging of short-wave infrared and mid-wave infrared at room temperature.
Researchers at Cornell University have developed a method to produce the darkest fabric currently reported, with no angle dependency. The team used polydopamine and etching in a plasma chamber to create nanofibrils that mimic the light-trapping capabilities of the riflebird's ultrablack feathers.
Researchers proposed a neural array imaging system to overcome limitations of metalenses, achieving high-quality imaging with reduced thickness. The system uses an array of small-aperture metalenses, enabling accurate image reconstruction and task-level visual perception.
A new multifocal metalens design enables super-resolution imaging of brain organoids, achieving twice the resolution of conventional WF microscopy. The system also suppresses background noise and resolves fine neuronal fibers.
Researchers have developed a method to generate and detect sound waves at sub-terahertz frequencies using optically driven devices. The discovery was made possible by launching shear hypersound pulses with exceptionally large amplitudes in metal halide perovskites.
A new €4.4 million EU-funded doctoral network, HiPOVor, aims to establish optical vortex beams as a key technology for advanced light-matter interaction. The project will train 15 doctoral researchers in generating and applying high-power optical vortex beams.
Optic disc edema progression in spaceflight predicted using optical coherence tomography imaging, suggesting crew members without ODE on day 30 unlikely to develop concern on day 150. This technology offers opportunity for predicting ODE magnitude during longer missions.
Researchers at the University of Cambridge have developed a new method to electrically power insulating nanoparticles using molecular antennas. This breakthrough creates a new class of ultra-pure near-infrared LEDs with applications in biomedical imaging, optical communications, and sensing. The devices can be turned on with low operat...
Researchers found that virtual staining can improve the use of medical images in certain cases, but not necessarily others. The study urges caution when deciding whether to apply AI to a given workflow.
Scientists propose and experimentally realize optical skyrmions in the spatiotemporal domain using transverse orbital angular momentum and vectorial shaping of pulsed light. The structures exhibit fascinating evolution during propagation, including the Gouy phase shift and changing beam size.
Researchers reveal peculiarities of room temperature organic photodetectors, highlighting their unique physical properties and special features. The upper detection limit for OSC photodiodes is comparable to that for ISC photodiodes, but with a significant spread in values.
Researchers discovered a new optical principle to amplify light in water using non-harmonic two-color femtosecond laser excitation. This breakthrough achieves a 1,000-fold enhancement in broadband white-light output and unlocks advances in bioimaging and ultrafast spectroscopy.
Chameleons have two long, coiled optic nerves that enable their remarkable ability to look in two different directions at once. Researchers used CT scanning technology to visualize the hidden structure, revealing a unique trait not seen in any other lizard.
A new study uses X-ray microcomputed tomography to image and analyze 3D chaotic microcavities without harming them. The team found that distorted shapes lead to Arnold diffusion, confirming a long-standing theoretical prediction about 3D chaotic light dynamics.
Kono recognized for his contributions to optical physics, light-condensed matter interactions and photonic applications of nanosystems. His research explores how light interacts with materials at the nanoscale, potentially leading to new technologies in electronics and quantum communication.
Scientists at Max Born Institute and DESY develop a plasma lens that focuses attosecond pulses, improving the study of ultrafast electron dynamics. The technique offers high transmission rates and allows for focusing light across different colors.
A European team developed an affordable and customizable luminescence imaging instrument with dynamic illumination, offering precision in a single platform. The device supports complex illumination protocols and is freely accessible via Zenodo.
A research team has achieved a major breakthrough in non-Hermitian photonics by realizing the transition from bound states in continuum (BICs) to exceptional points (EPs) in metasurfaces. This discovery verifies core theory and provides a new perspective on unique physical properties of non-Hermitian systems.
Researchers reviewed novel photonics breakthroughs of 2024, focusing on coupling free electrons with nonlinear optical states in integrated photonic microresonators. This enables ultrafast electron-beam modulation and novel research opportunities for electron imaging and spectroscopy.
Scientists create a new type of spatiotemporal vortex burst with time-dependent photonic characteristics, enabling precise control of ultrashort pulses in spatial and temporal dimensions. This innovation advances beyond conventional methods and opens new avenues for applications in light–matter interactions, spectroscopy, and nonlinear...
Researchers developed ultra-low voltage optoelectronic polymer memristors to address high power consumption and complex integration in edge computing. The devices achieved a fingerprint recognition accuracy of 97.15% in a reservoir computing framework.
A team of scientists proposed and demonstrated a coherent detector to efficiently detect the non-separability of vectorial structured light. The detector enables single-shot detecting the non-separability with low spatial complexity. Experimental results indicate high efficiency, low complexity, and stability.
A new chip architecture has successfully overcome major limitations of photonic neural networks, achieving record-breaking input sizes and robust performance with partially coherent light sources. The device demonstrated accuracies of 94% and 96% in handwritten digit and fashion image classification tasks.
A new platform allows researchers to study the forces that bind tiny objects together, revealing insights into self-assembly processes and fundamental forces in nature. The platform uses gold flakes in a salt solution, with light bouncing back and forth through nanometre-sized cavities to display colors.
A team of researchers has created a novel comb-like structure for on-chip detection, achieving an unprecedented detection efficiency of 99.73%. The hybrid integration strategy allows for scalability in quantum photonic chip applications.
A team of scientists uses weak-disturbance and high spatial-resolved imaging ability of PEEM to demonstrate near-field imaging and characterization of ultra-confined optical near fields in nanoslits. The technique identifies fabrication defects that are imperceptible to other means.
Scientists have reported an ultra-compact chaos-assisted computational spectrometer that overcomes the trade-off between physical size, resolution, and operational bandwidth. The device achieves a broad operational bandwidth of 100 nm with high spectral resolution of 10 pm.
A new fabrication method using photolithography template-assisted processing (PTA) enables high-resolution full-color Micro-QLED devices with pixel sizes ranging from 2 to 20 μm. The technology demonstrates outstanding performance with 1184 ppi resolution and brightness over 10,000 cd/m².
Recent advances in perovskite thin-film patterning techniques are crucial for high-performance optoelectronic devices. The research team introduces dimensional engineering, correlating material performance and structural dimensionality across different scales.
A new photonic chip called Gezhi achieves record-breaking speeds of 25 million images per second and consumes ultra-low light levels. This technology holds immense potential for large-scale expansion and high-performance applications in AI, autonomous driving, smart healthcare, machine vision, and language models.
The Ebbinghaus illusion shows that perception is not a mirror of reality but a construction of the brain. Research on fish and birds reveals diverse perceptual strategies, with guppies closely mirroring human perception and ring doves showing variability in their responses.
A new quantum-secured data transmission architecture has been proposed to address the challenges of AI-driven data centers. The system achieves terabit-per-second capacity while defending against future quantum threats through self-homodyne coherent transmission and integrated quantum key distribution.
Researchers have introduced a new theoretical framework that enables the confinement of light to extreme scales in lossless dielectric materials. Narwhal-shaped wavefunctions, discovered through singular dispersion equation, trap light at sub-diffraction volumes.
A low-cost smartphone imaging system called mDOC combines autofluorescence and white light imaging with machine learning to accurately identify oral lesions requiring specialist referral. The system achieved an area under the ROC curve of 0.778, outperforming dental providers in sensitivity and specificity.
The research team created a directional radiative cooling thermal protective window by integrating a visible transparent broadband directional emitter and Low-E film with commercial PC windows. The window features high visible transparency and low emissivity, making it effective at reflecting thermal radiation and preventing heat absor...
Researchers aim to create a thin, endoscopic 3D printer that can be inserted into the body to print tissue where it will later perform its function. The new technology has the potential to revolutionize regenerative medicine by allowing for direct printing of biological tissue inside the human body.
Scientists achieve major milestone in light-based technologies using exotic quantum materials to unlock previously inaccessible regions of the electromagnetic spectrum. They successfully generate even and odd THz frequencies, enabling compact terahertz sources, sensors, and ultrafast optoelectronic devices.
A team of researchers has revealed the interplay between skin modes and exceptional points in non-Hermitian systems. By coupling two systems, they demonstrated that multiple pairs of exceptional points can emerge, leading to a phase transition in skin modes and suppressing the coupled skin effect.
Using extreme ultraviolet high-harmonic interferometry, researchers tracked changes in the electronic bandgap of silica glass and magnesium oxide under strong laser excitation. The study found a shrinking bandgap in silica and a widening bandgap in magnesium oxide.
Researchers develop novel technique to efficiently generate and separate hyperbolic polaritons, opening new avenues for ultra-compact optical devices. The two-step excitation method creates pseudo-birefringence, sorting and steering the waves by mode into different directions.
Researchers develop new optical method to engineer and control topological solitons, such as skyrmions and antiskyrmions, within ferroelectric materials. The technique harnesses the Poincaré sphere concept to create and dynamically manipulate these nano-scale topological entities at ultrafast speeds.
Researchers discovered how individual MXene flakes behave at the single-flake level, revealing changes in conductivity and optical response. The new spectroscopic micro-ellipsometry technique allowed for non-destructive measurements of individual MXene flakes, providing fundamental knowledge needed to design smarter technologies.
The team developed a new method to produce ultrafast squeezed light, which can fluctuate between intensity and phase-squeezing by adjusting the position of fused silica relative to the split beam. This breakthrough could lead to more secure communication and advance fields like quantum sensing, chemistry, and biology.
Aarhus University researchers have developed a transparent layer with silver nanorings that adapts to sunlight intensity, controlling heat entry through glass without dimming the view. The thermoplasmonic effect reduces near-infrared transmission, lowering cooling demand and CO₂ emissions in energy-efficient buildings.
Researchers at TU Wien and Institut Langevin create fingerprint matrix technique to overcome problem of multiple scattering, allowing detection of objects even in dense cloud or murky water. The method has been tested on metal objects buried in sand, medical markers, and muscle fibers, with promising results.
Researchers create nanoscale slots to tune phonon vibrations, enabling ultrastrong coupling and hybrid quantum states in lead halide perovskite. This breakthrough could improve energy flow and performance in optoelectronics.
A new imaging method, HyFMRI, combines fluorescence and MRI to measure neuronal and astrocytic activity while mapping hemodynamic responses. This allows for direct measurement of local neural activity, crucial for functional neuroscience research.
UC Riverside-developed FROSTI system allows precise control of laser wavefronts at extreme power levels, opening a new pathway for gravitational-wave astronomy. This technology expands the universe's view by a factor of 10, potentially detecting millions of black hole and neutron star mergers with unmatched fidelity.
Researchers developed a novel method to regulate phosphorescent carbon dots by modulating the self-assembly of cyclodextrin through ultrasonic means. The resulting materials exhibit long-lived excited states, enhancing signal-to-noise ratio and tissue penetration for non-invasive imaging. Ultrasonic responsiveness is positively correla...
A new 3D imaging technique combines intensity diffraction tomography with adaptive optics to track subcellular structures over extended periods. This approach achieves high spatiotemporal resolution and molecular specificity, enabling the study of cellular dynamics.
Researchers discovered that ultrafast magnetization switching proceeds with a speed of about 2000 meters per second, not uniformly throughout the material. A moving boundary propagates through the film, sweeping through the entire layer in roughly 4.5 ps.
Scientists have developed a new plasmonic nanocavity that enhances two-photon upconversion from 2D excitons by 2440-fold. The nanostructure's resonance wavelength can be adjusted to optimize light collection and emission directionality, leading to improved efficiency in nonlinear photonic devices.
Exciton-polaritons in perovskites enable ultra-efficient photoluminescence, polariton lasing, and low-power laser applications. Perovskite semiconductors facilitate strong coupling at room temperature through simple methods, paving the way for robust and scalable photonic technologies.
Researchers developed a novel approach to visualize and quantify polluting nanoplastic particles in live intestinal organoids. The phasor-FLIM method demonstrates improved sensitivity and specificity for detecting internalized nanoparticles, allowing for accurate quantification of different types.
Researchers have developed a high-performance mid-infrared imaging system without lenses, capturing clear pictures over large distances and in low light. The system uses an optical pinhole inside a nonlinear crystal to form an image, which is then converted into visible light, allowing for distortion-free and large-depth imaging.
Researchers have demonstrated a portable, noninvasive technology that can detect metabolic changes linked to Alzheimer's disease by measuring cytochrome c oxidase activity. The study found that including oxCCO measures improved the ability of the brain-monitoring tool to capture clinically relevant brain changes.
A new system developed by Penn researchers allows light to be guided through tiny crystals with minimal scattering or reflection. This breakthrough paves the way for more efficient and controllable photonic chips, enabling faster data transmission and reduced errors.
The new Harvard device can turn purely digital electronic inputs into analog optical signals at high speeds, addressing the bottleneck of computing and data interconnects. It has the potential to enable advances in microwave photonics and emerging optical computing approaches.