Articles tagged with Applied Optics
Researchers successfully demonstrated the Talbot effect in diatom-inspired three-dimensional structures in the terahertz range. The fabricated structures replicate the native architecture of diatom frustules and reveal distinct optical roles for each layer.
The study introduces an integrated full-chip EUV curvilinear MO framework that merges deep-learning-enabled forward modeling and gradient-based inverse optimization. It reduces model complexity and memory usage through tunable U-Net surrogate models and slice-based approximated gradient calculation schemes.
Scientists developed a 2D thermo-optic modulation platform using QD film based micro-ring resonators, achieving a 19.77-fold increase in tuning sensitivity and a 50-fold improvement in modulation speed compared to conventional devices. The hybrid system enables real-time high-speed reconfiguration with enhanced performance and reduced ...
The University of Rochester-led NSF STELLAR Engine launches to strengthen US competitiveness in global markets by advancing lasers and laser application research. The project aims to bring New York laser research, development, and manufacturing to a scale that can compete globally.
A new mixed-frequency heterodyne demodulation (MHD) architecture has been developed to address limitations of existing multi-gas LITES systems. The novel architecture enables simultaneous detection of two gas species, achieving low-crosstalk detection and excellent linearity.
Researchers unveiled a technique to build ultra-clean 2D heterostructures using muscovite crystals, eliminating microscopic residues that disrupt electronic device performance. This method enables precise stacking of atomic layers, leading to new properties and potential breakthroughs in quantum computing and nanoelectronics.
Researchers at MIT have developed a microscopic pixel-based tunable lens that controls incoming infrared light for more precise thermal imaging, chemical sensing, or pollution monitoring. The system enables compact, dynamic infrared cameras with potential applications in environmental protection, space research, and military technology.
A new off-axis bright- and dark-field OCT architecture enhances detection robustness by capturing complementary defect information. The system balances high axial resolution with deep penetration, allowing for precise defect localization and improved classification accuracy.
The L²-CPI system extends optical microscopy capabilities by capturing data 'on the fly' and retrieving phase information with high precision. This allows for non-destructive inspection of large-scale nanometrology samples, such as wafer defect arrays, with sub-wavelength defect detection.
Scientists develop laser-assisted method to create precise 2D-TMD diffractive elements with high resolution. The technique enables scalable production of gratings and lenses on various photonic substrates.
A novel digital phase-shift mask projection lithography strategy has been proposed to overcome limitations of conventional photolithography. The approach integrates phase-shift mask principles into a programmable maskless lithography platform, enabling sub-diffraction-limited patterning with improved image contrast and resolution.
A team of scientists developed a dual-band hydrochromic optical modulator for multimodal anticounterfeiting and encryption. The device changes its appearance in the visible and mid-infrared regions through three modes: water-triggered visible switching, infrared emissivity modulation, and chemical signature authentication.
A new multimodal fluorescence-phase microscopy (MFPM) system combines fluorescence excitation with label-free imaging, achieving precise spatial co-registration and maximizing data acquisition efficiency. This unified platform enables comprehensive biological investigations with enhanced imaging throughput.
Researchers have created a special flat lens that shapes light into an optical needle, allowing for deeper imaging while maintaining high resolution. This innovation combines with optical coherence tomography (OCT) to extend imaging depth by a factor of nine without requiring a complicated redesign.
Scientists developed a device that controls heat radiation direction and switches this effect on and off, enabling 'heat programming' like microchip data. The new material exhibits different responses depending on light direction, improving efficiency compared to previous devices.
Researchers at Texas A&M University have developed a technique that maps chemical changes directly, using natural molecular vibrations. This allows for the observation of biological processes in real-time, giving researchers a more complete picture of how diseases emerge and evolve.
A new SPR holographic microscope has been developed with high sensitivity, label-free, non-invasive, and real-time measurement capabilities. It achieves ultrahigh RI resolution of 2.58 × 10⁻⁷ RIU and sub-nanometer thickness profiling resolution of 0.6 nm for atomic layer materials.
Researchers developed a frequency-domain thermoreflectance microscopy approach to visualize thermal conductivity and interfacial thermal conductance in thermal interface materials. The study reveals pronounced microscale heterogeneity, with high- and low-conductivity zones observed in particle-loaded thermal greases.
A pilot study found that an examiner-worn, neck-mounted camera can supplement the observation and review of clinical skills during OSCE assessments. The results showed moderate to strong agreement between live and video-based assessments, with the wearable camera enabling more observations to be evaluated than the fixed camera.
Researchers developed a chip-based metasurface biosensor to detect traumatic brain injury (TBI) biomarkers at extremely low levels. The technology could help doctors make faster diagnoses after head injuries, guiding treatment decisions.
Researchers at WVU are developing new laser-based techniques to observe plasma behavior in unprecedented detail, allowing them to examine how charged particles and energy move between plasmas and material surfaces. This study could lead to improved understanding of plasma sheaths and their role in surface wear and material lifetime.
Researchers developed a non-contact optical sensing strategy to detect ethanol molecules in air using light-field distortions and deep learning. The system employs a graphene-based Fresnel lens to focus light through interference, capturing minute changes in the focal spot formed by the lens.
Researchers have developed a polymer-based microring resonator array with over 40 elements, demonstrating broadband acoustic detection and fine spatial resolution. The system achieved strong correspondence with biological structures, including blood vessel regions, in imaging mouse prostate tissue.
Researchers have developed an AI-generated photonic framework that maps optical properties to subwavelength structures directly via a diffusion model. The system achieves high-precision mapping, flexible design constraints, and fuzzy search capability, transforming the field of photonic innovation.
A team of researchers from The University of Osaka has developed a new approach for depth reconstruction from defocus, estimating distances by analyzing blur in an image. Their method combines a coded-aperture camera with diffusion-model-based AI to accurately estimate depth and produce high-quality images.
Researchers developed an interferometric second-harmonic generation imaging approach to identify antiparallel domains and detect hidden structural defects in hBN thin films. The study finds that SHG intensity is closely associated with differences in crystal orientation and destructive interference between domains.
Researchers developed a new method to observe nanoscale spin waves, directly detecting short-wavelength magnons using resonant soft X-rays. The technique, called magnon momentum microscopy (MMM), reveals strong nonlinear interactions and four-magnon scattering processes in magnetic materials.
Researchers created a way to spot and correct distortions in light using artificial intelligence and a tiny optical element. The approach can improve the quality of images in fields like biology, astronomy, and precision manufacturing by making advanced optical systems faster, smaller, and easier to use.
Researchers developed a deep-learning framework that uses real-world measurements to design optical surfaces with precise control over light behavior. The AI model achieves high consistency with experimental results while reducing simulation costs and time.
Researchers from EPFL have developed a new holographic approach to volumetric 3D printing, enabling cell-compatible, high-resolution printing at near-clinical scales. The method uses phase control to produce higher-fidelity objects in light-scattering media, such as those containing living cells.
A new approach enables computers and machines to capture images at higher resolution and faster speed, making it impervious to reflective surfaces. The technology uses a virtual screen created by repurposing the surroundings of specular objects.
Researchers have published a new checklist of 924 diatom taxa alongside a curated dataset of 11,469 records in the open-access journal Biodiversity Data Journal, providing a long-needed foundation for environmental monitoring across the region. This dataset directly answers a key recommendation from the UN Plankton Manifesto and will s...
The study demonstrates a significant improvement in red light emission from Eu-doped gallium nitride grown on a semipolar crystal plane. The approach selectively promotes the formation of highly efficient luminescent centers, resulting in brighter and more stable red LEDs for next-generation micro-LED displays.
A team of researchers has developed a flexible neural sheet device that can record and stimulate neural activity across multiple sensory cortices in mice. The device, which is thinner than a human hair, is inserted into the epidural space to avoid brain penetration, allowing for wide-area coverage of the temporal and deep cortical areas.
A team of scientists developed a wafer-level-manufactured meta-aspheric lens that achieves simultaneous wide field-of-view, ultrathin form factor, and high imaging quality. The design enables compact near-infrared imaging systems with robust performance in eye tracking, blood vessel imaging, and computational pixel super-resolution tasks.
A new method for measuring homogeneity in transparent cylindrical materials has been developed, allowing for non-destructive inspection without slicing. This approach significantly reduces costs and improves quality control, making it suitable for industries such as semiconductor manufacturing and medical imaging.
A physics-guided neural network called SGARNet is developed to address challenges in lensless multi-core fiber imaging. It reveals the frequency-domain characteristic of honeycomb artifacts and introduces a SpectralGate module to selectively suppress artifact-related components, preserving useful image details.
Researchers developed curvature-optimized multilevel SERS substrates using femtosecond laser shaping, exhibiting enhanced Raman signal intensity and uniformity. The substrate features triple cross-scale structures with flexible shape parameters, promoting dimensionally ordered hot spots for improved detection sensitivity.
The Harvard-led team demonstrates a micron-scale photonic device that generates two orders of magnitude more UV light on a chip than previous approaches. By converting red light to UV light through frequency upconversion, the researchers create high-power, low-loss, compact UV sources.
Researchers leveraged a surprise discovery to devise a new bioimaging method that captures 3D images of the human blood-brain barrier 25 times faster than existing technology. This technique enables scientists to test whether new drugs for neurodegenerative diseases reach their targets in the brain.
Scientists successfully built the smallest X-ray interferometer to measure how X-rays interact with atomic nuclei. This breakthrough technology enables precise measurement of X-ray refraction and provides new avenues for research.
A new ultra-thin optical film improves the quality of light used in LCD resin-based 3D printers, ensuring precise details and reducing printing errors. The film's design enhances collimation and uniformity, paving the way for affordable industrial or medical-grade products.
New research reveals that the organization of electrons within a material determines its response to light. The study shows that moiré superlattices can be engineered to exhibit unusual properties by controlling electron arrangement.
Salk scientists and collaborators advance visualization technology using visible-spectrum antigen-stabilizable fluorescent nanobodies (VIS-Fbs), reducing background fluorescence by up to a hundredfold. The new probe enables high spatial and temporal precision, allowing for real-time tracking of dynamic changes in living models.
A team of physicists has discovered a way to boost the intensity of high-power laser light, opening up new possibilities for experiments in quantum electrodynamics. The breakthrough uses an unusual process to create extremely bright ultraviolet light, which can be focused into a tiny point creating immense energy concentration.
Researchers have developed a unified mathematical model explaining two types of 'breathing' solitons in ultrafast lasers, overcoming decades-old puzzle. The new framework accurately predicts complex behaviors and reveals underlying mechanisms.
Researchers develop signal-processing method to suppress distortions, achieving 6mm spatial resolution in single-ended Brillouin sensing. This enables early detection of damage or abnormal conditions in aging infrastructure.
Researchers propose a new approach to secure optical communication by hiding information in the physical structure of light, making it difficult for unauthorized parties to intercept or decode. Computer simulations showed that the method can transmit information reliably without revealing it through changes in beam size or intensity.
Researchers at The University of Osaka developed a new LED structure that generates circularly polarized light from a single chip, reducing energy-conversion loss. This advancement could support smaller and more energy-efficient optical devices for next-generation technologies.
Researchers have successfully created a high-efficiency quantum light source that emits bright lights even at room temperature using 2D semiconductors. The achievement is made possible by confining excitons in a tiny region via nanohole-induced confinement and neutralizing excess charges.
By striking a gold nanorod off-center with an electron beam, researchers created rotating circular polarization in light, a property useful for controlling information encoding and transmission. This simple approach could enable new ways to encode, route, and process information using light.
Researchers have developed a novel all-optical method called laser optothermal nanobomb (LOTB) for efficient flattening of nanobubbles in 2D materials. The method leverages an optothermally induced phase transition and stress-pulling effect to remove gas from the bubbles, flattening the film without damaging its intrinsic properties.
Researchers developed a graphite addition method to fabricate high-performance silicon carbide optical mirrors. The approach reduces free silicon content by 18.18% and enhances overall performance.
Scientists at Chiba University developed a simple method to generate high-quality optical bottle beams that remain concentrated over long distances. The technique uses a binary axicon and a flat multilevel diffractive lens to create sharp light structures.
A new laser source generates a specific type of light source called a frequency comb in the mid-infrared region, paving the way for miniaturization. The device overcomes engineering challenges to produce bright, stable, and compact frequency combs.