Articles tagged with Optical Materials
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.
A team of scientists developed a chlorophyll-based supramolecular polymer that can gradually evolve from nonhelical fibers into well-defined helical structures. The transformation occurs cooperatively and is driven by small energy differences between stable arrangements, offering a blueprint for designing dynamic helical structures.
Researchers at Tokyo University of Science demonstrated a method for manipulating metallic chiral nanoparticles using circularly polarized light. By confining light to an evanescent field near the surface of ultra-thin optical fibers, they selectively transported left- and right-handed particles based on their chirality.
A team of scientists has developed a new method to assemble luminescent molecules into nanotubes with unusual excitonic properties. The nanotubes can be arranged to form luminescent fibers that reach several centimeters in length, and exhibit multidirectional energy transfer within their interiors.
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.
The device exhibits outstanding performance across a broad optical spectrum, with high responsivity and specific detectivity. Its polarization-sensitive detection capability enables the direct deciphering of light's polarization state without external filters.
Researchers develop fluoride-engineered perovskite nanocrystal glass for high-efficiency, full-color emission and ultra-high-resolution holographic displays. The glass matrix enables stable and efficient photoluminescence of PNCs, driving the creation of high-quality dynamic displays.
Researchers explore new design strategies for metasurfaces and BICs, enabling scalable light control and efficient optoelectronic platforms. These advances have practical implications for applications in lasing, sensing, nonlinear optics, wavefront shaping, and imaging.
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 developed a dual-polarized asynchronous space-time-coding metasurface to control vortex electromagnetic waves, enabling high-dimensional multiplexing. This technology increases data rates and connectivity by exploiting three dimensions: OAM mode, polarization, and frequency.
Researchers from The University of Osaka propose a compact LED design that directly emits circularly polarized light, potentially simplifying optical devices. The new design uses robust inorganic materials and achieves high levels of both efficiency and polarization degree.
Researchers have achieved first-ever in-situ polarization control in high-field infrared spectroscopy, overcoming a decades-old technical bottleneck. The newly developed collimated magneto-infrared spectroscopy system enables continuous modulation of polarization states under high magnetic fields and cryogenic temperatures.
Engineers at Harvard create microcombs on photonic chips, enabling compact, programmable frequency combs for precision measurement and telecommunications applications. The breakthrough makes electro-optic microcombs more practical, energy efficient, and diverse.
The Hebrew University team designed an adiabatic transition to convert multiple few-mode sources into a single multimode fiber, enabling efficient combining of dozens of small semiconductor lasers. The technology simplifies high-power laser systems and optical communications, preserving brightness and easing alignment constraints.
Electrical engineers at Duke University have developed the fastest pyroelectric photodetector, capable of capturing light from the entire electromagnetic spectrum. The device requires no external power and operates at room temperature, making it suitable for on-chip applications and multispectral cameras.
Researchers developed a simple and reversible method for forming crystals using light-sensitive molecules, allowing for precise control over particle attraction and repulsion. This enables the creation of adaptable materials with tunable properties, such as reconfigurable optical coatings and adaptive sensors.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences have discovered a new way to generate ultra-precise, evenly spaced laser light combs on a photonic chip. This breakthrough could miniaturize optical platforms like spectroscopic sensors or communication systems.
A research team developed a zero-dimensional hybrid metal halide that exhibits reversible fluorescence switching under pressure and solvent stimulation. The material can be toggled between non-emissive and highly emissive states, paving the way for multifunctional optical applications.
A team from Harvard and University of Lisbon found that silica, a low-refractive index material, can be used for making metasurfaces despite long-held assumptions. They discovered that by carefully considering the geometry of each nanopillar, silica behaves as a metasurface, enabling efficient design of devices with relaxed feature sizes.
The new system can reveal early cancers, lung disease, hidden material defects and changes in porosity without multiple exposures or complex mechanical movement. This method produces low-dose and faster images, lowering patients' radiation dose and making clinical translation feasible.
A research team at CUNY and UT Austin discovered a way to control dark excitons, highly promising for quantum information and advanced photonic applications. They amplified light emission by 300,000 times, making them visible and controllable.
Scientists at The University of Osaka have developed an innovative method for producing NOBIN, a valuable molecule used in pharmaceuticals, by combining a vanadium catalyst and LED light. This clean process yields only water as a byproduct, showcasing exceptional environmental compatibility and waste reduction.
Rice scientists developed a method to pattern device functions with submicron precision directly into an ultrathin crystal using focused electron beams. The approach created bright blue-light emitting traces that also conduct electricity, potentially enabling compact on-chip wiring and built-in light sources.
Researchers at Politecnico di Milano developed photonic chips for training physical neural networks, eliminating digitisation requirements. This allows for faster, more robust, and efficient network training using light signals.
Researchers create metasurfaces to control photons and entangle them for quantum computing and sensing. The discovery could lead to miniaturized optical setups with improved stability, robustness, and cost-effectiveness.
Researchers at Harvard and TU Wien have developed a new type of tunable semiconductor laser with smooth, reliable, and wide-range wavelength tuning in a simple chip-sized design. This innovation could replace many types of tunable lasers with a smaller, more cost-effective package.
A nanometer-thin spacer layer has been inserted into exciplex upconversion OLEDs (ExUC-OLEDs) to improve energy transfer, enhancing blue light emission by 77-fold. This design enables the use of previously incompatible materials, paving the way for lightweight, low-voltage, and more flexible OLEDs.
Researchers have developed a new platform using dispersion-managed silicon nitride microresonators to suppress timing jitter, achieving femtosecond-level precision. This breakthrough enables the deployment of chip-scale solitons in space navigation, ultrafast data networks, and quantum measurement systems.
Scientists at UC Riverside are investigating plasmonic materials that can transfer energy when struck by light. Their findings could lead to sensors capable of detecting molecules at trace levels and other technologies with practical applications.
Researchers at Pohang University of Science & Technology (POSTECH) have developed an achromatic metagrating that handles all colors in a single glass layer, eliminating the need for multiple layers. This breakthrough enables vivid full-color images using a 500-µm-thick single-layer waveguide.
Researchers at University of Rochester and RIT created an experimental quantum communications network to transmit information securely over long distances. The network uses single photons to enable secure communication without cloning or interception.
Researchers developed fluorescent polyionic nanoclays that can be customized for medical imaging, sensor technology, and environmental protection. These tiny clay-based materials exhibit high brightness and versatility, enabling precise tuning of optical properties.
The study successfully manipulated the formation of left-handed or right-handed helical aggregates using precise light control, exhibiting promising insights into novel functional materials. The researchers found that residual aggregates acted as nucleation sites forming oppositely directed helical assemblies under certain conditions.
A new amplifier developed by Chalmers University of Technology can transmit ten times more data per second than current systems, holding significant potential for various critical laser systems, including medical diagnostics and treatment. The amplifier's large bandwidth enables precise analyses and imaging of tissues and organs.
Researchers successfully synthesized polyaniline with a golden luster, exhibiting unique properties and potential for micro-organic semiconductor devices. The material's metallic luster is attributed to polarons and surface luster, setting it apart from conventional conductive polymers.
The study outlines opportunities for advancing fundamental understanding of wave-matter interactions, unlocking exotic effects such as perfect absorption and super-resolution imaging. Complex frequency excitations offer an alternative approach to enhance wave control using conventional materials.
Researchers developed new photon avalanching nanoparticles that exhibit high nonlinearities, overcoming challenges in realizing intrinsic optical bistability at the nanoscale. The breakthrough paves the way for fabricating optical memory and transistors on a nanometer scale comparable to current microelectronics.
Researchers at UC Santa Barbara develop a chip-scale ultra-low-linewidth self-injection locked laser, outperforming current tabletop systems in key metrics. The technology enables scalable laser solutions for quantum computing and portable field-deployable sensors with improved interaction with atomic systems.
Scientists developed a novel method to create colloidal molecules with specific symmetry using fluorescent polymers and self-assembly. The process allows for the formation of soft materials with various symmetries depending on the polymer mixing ratio.
Osaka University researchers develop a new method for long-range enhancement of fluorescence and Raman signals using Ag nanoislands protected with column-structured silica layers. This leads to an astonishing ten-million-fold increase in signal strength, making it ideal for sensitive biosensing applications.
Researchers developed a new AI model that predicts optical properties across a wide range of light frequencies using only a material's crystal structure as input. This enables highly precise predictions, making it suitable for screening materials for high-performance solar cells and detecting quantum materials.
Researchers have developed a new engineering approach to on-chip light sources, enabling the widespread adoption of photonic chips in consumer electronics. The innovation involves growing high-quality multi-quantum well nanowires using a novel facet engineering approach, which enables precise control over the diameter and length of the...
Researchers from Shinshu University developed a novel method to produce optical materials by using plasma etching on pencil lead, enabling structural colors and invisible characters. The technique could pave the way for sustainable optical materials with tailored reflectance spectra.
Researchers directly observed Floquet states in colloidal nanoplatelets driven by visible pulses using all-optical spectroscopy. The study provided an all-optical direct observation of Floquet states in semiconductor materials and uncovered rich spectral and dynamic physics of these states.
Researchers at Tokyo Institute of Technology have developed a novel strategy to increase the efficiency of photopolymerization reactions by leveraging dynamic UV lighting. This technique produces heavier polymer chains with reduced energy consumption, offering potential for sustainable industrial processes and polymeric materials.
Researchers at the University of Chicago have discovered a new material, MnBi2Te4, that can store and access computational data using light. The material's magnetic properties change quickly and easily in response to light, making it suitable for optical storage devices.
Researchers developed a new 2D quantum sensing chip using hexagonal boron nitride that can simultaneously detect temperature anomalies and magnetic fields in any direction. The chip is significantly thinner than current quantum technology for magnetometry, enabling cheaper and more versatile sensors.
Researchers at Florida State University have identified a new phenomenon in Kagome metal CsV3Sb5, which can create hyperbolic bulk plasmons with reduced energy loss. This breakthrough has the potential to advance technologies in nano-optics and nano-photonics.
Researchers at UBC created a new super-black material using plasma etching, absorbing up to 99% of visible light. The material, called Nxylon, has potential applications in astronomy, solar cells, and luxury consumer goods.
Researchers at UCLA have developed a wavelength-multiplexed diffractive optical processor that enables all-optical multiplane quantitative phase imaging. This approach allows for rapid and efficient imaging of specimens across multiple axial planes without the need for digital phase recovery algorithms.
Researchers developed OptoGPT, an algorithm that designs optical multilayer film structures for various applications. It produces designs in 0.1 seconds and contains six fewer layers on average compared to previous models.
The layered multiferroic material nickel iodide (NiI2) has been found to have greater magnetoelectric coupling than any known material of its kind, making it a prime candidate for technology advances. This property could enable the creation of magnetic computer memories that are compact, energy-efficient and can be stored and retrieved...
A team of researchers from the University of Kansas has discovered a microscopic mechanism that explains why a new class of organic semiconductors outperforms others. This breakthrough could lead to more efficient solar cells and photocatalysts for producing solar fuels, revolutionizing the clean energy sector.
Researchers from the Max Born Institute have developed a method to manipulate magnetism using circularly polarized XUV radiation, generating large magnetization changes without thermal effects. The study demonstrates an effective non-thermal approach to controlling magnetism on ultrafast time scales.
The study reveals that the electric blue spots of the bluespotted ribbontail ray are produced by unique skin cells with a stable 3D arrangement of nanoscale spheres containing reflecting nanocrystals. The team believes this colouration provides camouflage benefits to the stingrays, allowing them to blend with their surroundings.
Researchers developed a new two-photon polymerization technique using two lasers to reduce the power requirement of femtosecond lasers. This approach enables increased printing throughput and lower cost, impacting manufacturing technologies in consumer electronics and healthcare sectors.
The University of Maryland team created a camera mechanism that mimics the involuntary movements of the human eye, resulting in sharper and more accurate images. The Artificial Microsaccade-Enhanced Event Camera (AMI-EV) has implications for robotics, national defense, and industries relying on accurate image capture.
A research team from the University of Jena developed a micro-lens with an intelligent behavior that changes in response to gas molecules. The lens is made of hybrid glass and consists of a three-dimensional lattice with cavities that accommodate gas molecules, affecting its optical properties.
Researchers observed the formation of butterfly scales' ridged pattern through advanced imaging techniques. The team found that a smooth surface wrinkles to form microscopic undulations before growing into finely patterned ridges.
The Indian Institute of Science has fabricated a device to up-convert short infrared light to the visible range, utilizing a non-linear optical mirror stack made of gallium selenide. This innovation has diverse applications in defence and optical communications, including astronomy and chemistry.