Scientists have successfully demonstrated light-induced locomotion in a nonliquid environment using antimony telluride plates. The new type of motion, driven by thermal effects, enables efficient actuation in vacuum systems, opening up possibilities for mobile photonic modulation and multimode micro robots.
A new deep learning model using conditional generative adversarial networks (cGANs) has been developed to diagnose bowel ischemia. The model achieved an accuracy of over 93% in segmenting ischemic intestine images, surpassing current subjective methods.
Researchers developed a novel optical technique to directly monitor cerebral oxygen consumption and blood flow in real-time. The technique uses phosphorescent probes to track the brain's oxygen gradient, providing valuable insights into brain activity and metabolism.
Researchers have developed a method for centimeter-scale color printing using grayscale laser writing, achieving vivid and fine-tunable colors. The technique leverages pixelated optical cavities to generate transmission colors with a transmission efficiency of 39-50%.
Researchers develop a new way to manufacture high-efficiency diffraction gratings using reactive ion-plasma etching, achieving near-theoretical unpolarized diffraction efficiency of 94.3%. The process enables robust and durable gratings suitable for harsh environments.
Researchers have demonstrated a power-efficient component for demultiplexing operation using silicon photonic MEMS, enabling efficient wavelength demultiplexing for fiber-optic communications. The compact footprint of the add-drop filter allows fast operation compared to established MEMS products.
Researchers develop hybrid brightfield-darkfield transport of intensity approach, expanding accessible sample spatial frequencies and achieving 5-fold resolution increase. This method enables precise detection and quantitative analysis of subcellular features in large-scale cell studies.
Researchers developed high-capacity free-space optical links using unipolar quantum optoelectronic devices, achieving unprecedented data rates of up to 30 Gbit/s at 31-meter distances. The system's performance is resistant to weather conditions and showcases potential for fast, long-range optical links.
Researchers developed a novel method to create deep nanochannels in hard and brittle materials like silica, diamond, and sapphire. By employing femtosecond laser direct writing technology, they achieved sub-100-nm feature sizes and ultrahigh aspect ratios.
Researchers from the University of Kassel developed an approach to extend the limits of interferometric topography measurements for optical resolution below small structures. Microsphere assistance enables fast and label-free imaging without requiring extensive sample preparation.
An AI-based model has been developed to assist radiologists in detecting and identifying leadless implanted electronic devices (LLIEDs) on chest X-ray images. The model achieved high detection and classification accuracy, even with suboptimal image quality, and showed promise for real-world deployment.
A novel algorithm uses near-infrared spectroscopy to estimate intracranial pressure (ICP) based on hemoglobin levels. The research validates the accuracy of this method using invasive ICP data.
Researchers propose an optical imaging system for real-time hypoxia imaging in cancer treatment. The technique utilizes protoporphyrin IX to enhance contrast between tumors and healthy tissues, allowing for more effective surgical removal.
Researchers developed a novel three-core optical fiber sensor to accurately measure both the magnitude and direction of spine curvature. The sensor offers advantages like low cost, high sensitivity, and small size, making it a promising tool for doctors to diagnose problems in spine curvature.
A novel 937-nm laser source has been developed for multiphoton microscopy, enabling deep tissue imaging at depths of over 600 µm with only 10 mW of power. This breakthrough technology offers a good balance between sensitivity, penetration depth, and imaging speed.
Scientists have developed a new solar-powered laser with improved conversion efficiency, enabling more stable and efficient space-based energy generation. The design features four mirrors and laser rods, allowing for precise control over the pump cavity and minimizing thermal stress effects.
A NASA initiative studies wildfire-induced air pollution by measuring atmospheric CO and O3 levels using airborne observations. The study found that CO levels increased in the plume as it was transported away from the fire site, while plume age was associated with distance in both vertical and horizontal directions.
The report explores diffuse optical imaging methods applicable to noninvasive human studies, including near-infrared spectroscopy (NIRS) and diffuse correlation spectroscopy (DCS). It introduces state-of-the-art technologies and software, exploring their impact on neuroscience and clinical applications.
Researchers successfully demonstrate room-temperature multiband microlasers spanning a large wavelength range using rare earth elements. The lasing process combines downshifting and upconversion, expanding the emission wavelength range. The resulting microlasers exhibit good intensity stability and are suitable for practical applications.
Researchers developed a novel biologically-inspired intraoral camera with a wide-angle insect eye structure, increasing field of view and resolving optical aberrations. The device provides multifunctional dental imaging, including high dynamic range, 3D depth, and autofluorescence, without discomfort or image blur.
Researchers characterize material properties of IP-Q using Raman spectroscopy and nanoindentation, revealing elastic parameters and their effects on acoustic behavior. The study optimizes elastic parameters for TPP-fabricated structures, benefiting applications in life science, mobility, and industry.
A recent study combined elevation data of the Antarctic ice sheet from two different satellites, CryoSat-2 and Sentinel-3, to obtain a more accurate map of latest elevation changes. The results showed that the average elevation of the ice sheets had decreased at a rate of 4.3 cm/year during 2016-2019.
A newly developed polarizer-embedded metalens microscope system achieves high-quality, wide-field imaging with a large depth-of-field, significantly expanding human eyesight to the microworld. The chip-scale device offers a thousand-fold reduction in volume and weight compared to traditional microscopes.
Researchers propose a novel paradigm using nanoscale nonlinear fluid dynamics to support recurrent neural networks in neuromorphic computing. The liquid film functions as an optical memory, enabling 'reservoir computing' capable of performing digital and analog tasks.
The researchers achieved ultranarrow linewidths and wavelength tunability in the lithium niobate microlaser, enabling applications like lidar and metrology. The single-mode lasing is realized through simultaneous excitation of high-Q polygon modes at both pump and laser wavelengths.
A new broadband near-field chiral source enables comparison of different edge states to advance applications in integrated photonics and wireless devices. The research advances the field of chiral photonics science, promoting applications of chiral-sorting technology for microwave metadevices.
Researchers developed topological membrane metadevices for on-chip terahertz wave manipulations, showcasing robust single-mode manipulation and valley-locked edge states. This breakthrough enables the development of a robust platform for terahertz on-chip communication, sensing, and multiplexing systems.
Researchers developed a novel approach to detecting hidden malicious codes in websites by analyzing common attack patterns and user-side scripts. The method can identify malicious distribution patterns with high accuracy and speed, including zero-day attacks.
The study compares the behavior of flat (1D), cylindrical (2D) and spherical (3D) micromirrors for free-space light coupling. Silicon micromirrors were fabricated and used to experimentally validate the coupling efficiency in visible and near infrared wavelengths.
Researchers developed a novel convolutional neural network for facial expression recognition, outperforming conventional models while being computationally less expensive. The new model achieved an accuracy of 72.4% using only 58,000 parameters.
Researchers developed a lidar-based system for smart cars to recognize objects more accurately than cameras. The system uses a grid map to divide the field of view into regions containing individual objects.
Researchers developed a novel frequency-domain method to selectively suppress background noise in STED microscopy, achieving higher spatial resolution and improved signal-to-noise ratio. The approach has potential applications in various dual-beam point-scanning techniques.
Lithium niobate photonics has developed rapidly, enabling compact devices with high performance. Thin film lithium niobate (TFLN) structures have shown significant improvements in refractive index contrast, paving the way for more integrated photonic devices.
Researchers constructed a synthetic stub lattice in two coupled rings of different lengths, observing flat bands, band transitions and mode localization. This experimental demonstration enables dynamic control of light and may pave the way for future applications in optical communications.
A collaborative initiative aims to establish common protocols for assessing and comparing diffuse optics systems used in medical diagnosis. The study presents the results of a multi-laboratory comparison of 12 institutions and 28 systems, proposing simple numeric values for easy comparison across instruments.
Researchers have developed a single-cell PV design integrated with nonreciprocal optical components to provide 100-percent reuse of emitted radiation, breaking the Shockley–Queisser limit. This breakthrough enables a quasimonochromatic radiation converter to reach the theoretically maximum Carnot efficiency.
Researchers developed a hot-carrier multijunction solar cell that maintains high conversion efficiency with nonoptimal materials, expanding the scope of candidate designs. The novel architecture showed superior resilience to design imperfections, widening the range of suitable materials and operating conditions.
Researchers have developed a new tool to visualize leukocytes in the brain vasculature during in vivo two-photon laser scanning microscopy. The tool uses a fluorescent antibody targeting CD45, a ubiquitously expressed protein on white blood cells, allowing for tracking of circulating leukocytes over time and space.
By pairing two waveguides, one with an ill-defined topology and another with a well-defined one, researchers created a topological singularity that can halt waves in their tracks. This phenomenon has potential applications in energy harvesting and enhancing nonlinear effects.
New research develops a low-index BaF2 thin film-based microspectrometer technology for LWIR spectral sensing. The study demonstrates the use of flat and stress-free free-standing distributed Bragg reflectors (DBRs) for high-performance wavelength discrimination in the long-wave infrared region.
Researchers conducted wave-optics simulations to study the impact of turbulence on light beams, finding that branch point density grows non-linearly with grid resolution. The study's results could lead to more accurate modeling and improved performance in Adaptive Optics systems.
Researchers developed efficient metal-free polymeric scintillators for high-resolution X-ray imaging, outperforming conventional anthracene-based scintillators. The polymers exhibit multicolor radioluminescence and high photostability, enabling applications in radiation detection, medical diagnosis, and security inspection.
A team of researchers has developed a novel method using infrared imaging to assess glymphatic function, which is crucial for understanding neurological conditions. The technique allows for the measurement of temporal dynamics of glymphatic functions and provides insights into brain fluid exchange and clearance.
A new sensor technology allows for real-time monitoring of lactate levels in the brain, providing insights into energy metabolism and potential applications in cancer detection. The sensors corrected for hemodynamic artifacts using MRI-informed corrections enable accurate cell-specific lactate level recordings.
Researchers proposed and experimentally demonstrated an all-optical random bit generation method using chaotic pulses quantized in the optical domain. This method generated a 10 Gb/s random bit stream, potentially operable at higher rates by exploiting ultrafast fiber response.
The latest neurophotonic tools and techniques are reviewed in a new status report, covering advances from molecular nanoprobes to cortical column imaging. The report provides an overview of current state and future directions for brain science research.
The Imaging X-ray Polarimetry Explorer (IXPE) mission enables new measurements of cosmic X-ray sources, such as pulsars, black holes, and neutron stars. With its state-of-the-art telescopes and detectors, IXPE will provide high-quality polarization data of various sources, including supernova remnants, active galaxies, and blazars.
Researchers developed a light-controllable time-domain digital coding metasurface that can manipulate microwave reflection spectra by time-varying light signals. The metasurface platform produces harmonics based on phase modulation, generating symmetrical harmonics and white-noiselike spectra.
Researchers at Samsung have developed a novel approach to inspect critical dimensions of semiconductor devices, improving speed and resolution. The new 'line-scan hyperspectral imaging' (LHSI) technique offers faster measurements with high spatial resolution, outperforming existing methods.
Researchers developed a novel algorithm, 'Joint Space and Frequency Reconstruction' (JSFR-SIM), to accelerate image reconstruction in optically sectioned superresolution structured illumination microscopy. The method achieves 80 times faster execution speed without compromising image quality.