Articles tagged with Light Refraction
Researchers from Aarhus University developed a low-cost multispectral imaging system that uses LEDs at 16 different wavelengths to reveal differences in materials. The system was tested at Sorte Muld and Fredbjerg, revealing new layers and changes in the fill that were difficult to distinguish in normal color photographs. This technolo...
Researchers at KAIST develop a 'pedestrian-friendly smart window' technology that reduces heating and cooling energy consumption in urban buildings while resolving light pollution issues. The RECM system operates in three modes, allowing for real-time adjustment of light and heat transmission.
Researchers at Weizmann Institute create innovative method to track rapid material changes using two laser beams, enabling precise reconstruction of optical delay changes. This advance could lead to the development of fastest processors possible, increasing data transmission speed.
Researchers at Lancaster University have successfully demonstrated negative refraction using atomic arrays, eliminating the need for metamaterials. This achievement paves the way for novel technologies based on negative refraction, including perfect lenses and cloaking devices.
Researchers at Seoul National University's Optical Engineering and Quantum Electronics Laboratory developed an optical design technology that dramatically reduces the volume of cameras with a folded lens system utilizing metasurfaces. The new lens system achieves a thickness of 0.7mm, making it suitable for ultra-compact devices such a...
A team of researchers has developed a compact augmented reality (AR) display that can be integrated into eyeglasses, significantly improving image quality and field of view. The new technology combines two optical technologies to create a high-resolution AR system with minimal distortions.
The Chinese College of Interventionalists has introduced a consensus statement on TACE refractoriness in hepatocellular carcinoma, providing a framework for clinicians to identify and manage the condition. This move aims to optimize treatment strategies and improve patient outcomes, particularly in China where HCC incidence is high due...
Kobe University researchers have discovered that the shimmering effect in some brown algae is due to the presence of tiny, uniform-sized spheres within cells called iridescent bodies. These microspheres reflect green light more than other colors, resulting in the alga's characteristic shine.
Scientists at Tohoku University create a tiny spot in glass using a tailored laser beam, enabling precise processing at scales below 100 nanometers. The breakthrough opens up new possibilities for laser nano-processing in various industries and scientific fields.
Scientists create a simple approach to fabricating highly precise 3D aperiodic photonic volume elements (APVEs) for various applications. The method uses direct laser writing to arrange voxels of specific refractive indices in glass, enabling the precise control of light flow and achieving record-high diffraction efficiency.
A water droplet acts as a model of an atom when illuminated by laser light, allowing researchers to study resonance phenomena and energy levels. The droplet's size changes due to evaporation, creating a visible 'optical atom' that can be used to analyze water quality and detect pollutants.
Researchers can now study microplankton at an individual level using holographic microscopy and AI, gaining a deeper understanding of their movement, growth, reproduction, and interactions. This breakthrough provides new insights into the ocean's oxygen production and carbon cycle.
A new study predicts that climate change will increase rainbow viewing opportunities in northern latitudes and high elevations, while decreasing them in tropical regions. The research used photographs from Flickr to map rainbow occurrences under current and future climates.
Engineers at Rice University have discovered a way to manipulate light at the nanoscale that surpasses the traditional Moss rule for optical materials. The researchers found that iron pyrite has a high refractive index, making it suitable for applications such as virtual reality and 3D displays.
A new light-based sensor harnesses the light-guiding properties of spider silk to detect and measure small changes in the refractive index of a biological solution, including glucose and other types of sugar solutions. The sensor is practical, compact, biocompatible, cost-effective, and highly sensitive.
Researchers from GIST have developed an amphibious artificial vision system with a panoramic field-of-view based on the Fiddler crab's eye structure. The system overcomes limitations of current artificial visions, enabling imaging in both aquatic and terrestrial environments.
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 developed a non-invasive optical technique using spectroscopy to identify structural changes in the brain and diagnose Alzheimer's disease. The new technology has potential as a simple, completely non-invasive method of early detection and could also assess treatment effectiveness.
Researchers at KTH Royal Institute of Technology have developed a transparent composite material made from limonene acrylate, a monomer derived from renewable citrus. The material offers high optical transmittance and low haze, with applications in structural use and potential uses in smart windows and nanotechnology.
Researchers used image-analysis methods from engineering to spot minute movements of a stony coral. The study found more activities happening under nighttime conditions and provided insights into coral behavior and physiology.
Researchers at MIT have developed a dynamical machine learning approach to tackle the challenge of reconstructing object interiors from limited-angle data. The method exploits sequential information to improve reconstructions, achieving promising results in weak and strong scattering conditions.
A recent study published in Physical Review X reveals that the refractive index of dilute atomic gases can only reach a maximum value of 1.7 due to near-field interactions and multiple scattering effects.
Researchers discovered giant optical anisotropy in molybdenum disulfide crystals, enabling compact photonic devices and waveguides. The material's birefringence value is several times greater than previous record-breakers.
Researchers have fabricated a tunable metalens made of phase-changing material GSST that can focus light on objects at multiple depths without moving. This enables the creation of miniature optical devices such as heat scopes for drones and ultracompact thermal cameras for cellphones.
A research team at Pohang University of Science & Technology has developed ultra-high refractive index lenses using visibly transparent amorphous silicon. The new material allows for the control of all visible light colors, enabling more efficient and cost-effective virtual and augmented reality devices.
The researchers designed a single flat piece of glass with microscopic structures to manipulate light and produce crisp, 180-degree panoramic images. The new design enables ultra-wide-angle lenses to be integrated into smartphones, laptops, and medical imaging devices.
Scientists at Rice University have created a two-dimensional material with unique optical characteristics that can be controlled by ambient light. This innovation has the potential to aid the development of 3D displays, virtual reality, and lidar systems for self-driving vehicles.
Researchers have developed a new type of laser beam that doesn't follow long-held principles about how light refracts and travels. The beams, known as spacetime wave packets, can be arranged to behave in the usual manner, not changing speed at all, or even speeding up in denser materials.
Researchers found that ants tend to avoid parts of impediments that slow them down, similar to how light rays take time-reducing paths. The study used lens-shaped impediments and observed that ants diverged from the center on convex lenses and converged on concave lenses.
Researchers have created a hydrogel that responds to optical stimuli and modifies the stimulus in response, trapping light within regions of the material. The discovery opens new pathways toward creating devices that aren't reliant on human control.
Scientists have created a novel material that can change its refractive index in response to low-intensity laser light, enabling the manipulation of light beams and creation of optical logic gates. This breakthrough could lead to the development of soft, circuitry-free robots driven by light from the sun.
Researchers at VTT created an optical fibre from cellulose, suitable for measuring moisture levels in buildings. The cellulose-based fibre absorbs and releases water, allowing for accurate measurements.
Researchers found identical structures in horseshoe crab and ancient sea scorpion eyes, suggesting contrast enhancement evolved over 400 million years. The findings shed light on the evolution of compound eyes in arthropods.
A team of scientists at Tokyo University of Science developed a new method to modulate light using water as a medium, called giant optical modulation. This technique is less expensive and easier to use than conventional methods, with a maximum intensity change of 50% proportional to the applied AC voltage.
A team of researchers identified a critical protein component essential for coordinated motion in comb jellies. The study found that this protein, CTENO64, plays a vital role in maintaining harmony among the tiny surface organelles on comb plates, which propel these marine animals through the ocean.
Skoltech scientists have developed a method to control the nonlinear optical response of carbon nanotubes using electrochemical gating. This approach enables designing devices that can control the duration of laser pulses, opening up new possibilities for universal laser systems with controllable pulse duration.
Researchers at Duke University have developed a method to increase optical coherence tomography resolution down to a single micrometer, enabling live imaging of tissues throughout the body. Machine learning tools are used to compensate for light distortions and create high-quality images.
Researchers at McMaster University have developed a novel form of computing using light patterns and materials that react intuitively to light. This new approach enables simple calculations such as addition and subtraction without the need for power sources.
Engineers at MIT and Penn State University developed a model predicting the color of droplets given specific structural and optical conditions. The team found that total internal reflection allows hemispherical droplets to produce color through interference effects, which are stronger in small droplets.
Researchers at Penn State and MIT discovered that uniform-sized clear water droplets on a surface can produce bright iridescent colors. The color is due to total internal reflection and light interference, creating an optical effect not possible in perfect spheres.
Researchers discovered a novel mechanism for high-quality optical resonators by exploiting the mutual destructive interference of two low-quality optical states. This allows for secure light trapping in various materials at small scales, enabling the creation of compact devices like sensors and filters.
Scientists from the Max Born Institute have created the first refractive lens that focuses extreme ultraviolet beams, utilizing a jet of atoms instead of traditional glass. This innovation enables novel approaches to image biological samples on extremely short timescales, with potential applications in microscopy and structural analysis.
Researchers are investigating the fundamental physics of how light is contained within photonic lattices. Dr. Robert Magnusson aims to understand the relationship between leaky and non-leaky modes and develop new low-power modulators for optical communications systems.
A team of scientists at the University of Cambridge has created a super-thin, non-toxic, lightweight, edible ultra-white coating that mimics the structure of beetle scales. The material scatters light extremely efficiently, producing bright white colours without the need for pigments.
Researchers at LMU Munich create a new mode of electron microscopy that enables the observation of fundamental interactions between light and matter in real time and space. The technique uses attosecond pulse trains to monitor ultrafast processes initiated by light oscillations onto matter, allowing for sub-atomic resolution.
Researchers from University of Houston release open-source dataset and instructions for building a smartphone microscope with an inexpensive inkjet-printed elastomer lens. The device can perform fluorescence microscopy, detect waterborne pathogens, and has potential applications in rural areas and developing countries.
Scientists have successfully developed a zero-index waveguide compatible with current silicon photonic technologies, allowing them to observe standing waves with infinitely-long wavelengths. This breakthrough could enable the creation of ultra-compact optical devices and pave the way for new quantum computing applications.
Scientists have made a groundbreaking discovery about the optical properties of glass, finding that stable glasses can exhibit birefringence despite having no molecular orientation. This unique property allows for the creation of scratch-free coatings and materials with different mechanical properties.
Researchers from Kazan Federal University and international partners successfully amplified a localized optical signal within a titanium nitride nanoantenna. The phenomenon is based on the nonlinear interaction of surface plasmon-polaritons and localized Stokes waves.
Viscoelastic polymer solutions exhibit elasticity, causing severe distortions in observed flow patterns. Researchers also studied 'living polymers', finding unique flow patterns with blockages in the channel.
Researchers in China developed a 'shadow method' to measure forces acting on water strider legs, revealing key principles behind their locomotion. The technique could help design advanced biomimetic robots and measure forces at the single molecular level.
Scientists have created a new solid 3D superlens using nanobeads, enabling the view of previously invisible details on surfaces. The technology adds 5x magnification to existing microscopes, opening up new possibilities for biology and medicine.
A NASA team is testing a photon sieve optic for improved UV resolution, which could help answer a 50-year-old question about the sun's corona. The new technology has already achieved success in its initial testing phase.
By immersing glass particles in a fluid, researchers enhanced the optical properties of both solids and liquids, demonstrating significant changes in diffusivity. The findings have potential applications in imaging, sensing, and photography, including calibrating medical-imaging systems and creating tunable optical devices.
A team of researchers led by Robert W. Boyd has demonstrated up to 100 times greater nonlinearity in indium tin oxide than other known materials, revolutionizing photonics applications. This breakthrough opens the door for more careful study of the material's unique properties and potential applications.
PolyU has achieved the world's fastest optical communications speed for data centres by reaching 240 G bit/s over 2km, reducing transmission cost per unit to one-fourth. This breakthrough enables widespread use of immersive videos and new IoT applications.
Researchers have created a new method to create flat optical lenses that can bend light to a single point, correcting a widespread misconception. The new lens is up to 10 times thinner than current camera lenses and could be used in medical devices, drones, and future smartphones with high-powered cameras.
Researchers at Harvard have created the first on-chip metamaterial with a refractive index of zero, allowing for infinitely fast light manipulation. This discovery has exciting applications in quantum computing and integrated optics.
A new type of electro-optic modulator is smaller, faster, and cheaper than traditional models, using plasmon-polaritons to enhance its performance. The device consumes much less energy than current commercial devices, making it a crucial step towards reducing the environmental impact of data transmission.
A research team at Georgia Institute of Technology has realized a nonlinear material with opposite refractive indices at the fundamental and harmonic frequencies of light, as predicted theoretically. This discovery has significant implications for controlling light in information processing, sensing, and signal generation.