Articles tagged with Light Sources
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.
A new manufacturing strategy for semiconductor quantum dots has been developed, offering advantages for light-based technologies. The method produces single and entangled photon emitters with low surface density, high symmetry, and wavelengths suitable for integrated photonics.
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.
The Harvard team developed a new microfabrication method to produce high-performance, curved optical mirrors with extremely smooth surfaces. The mirrors can control light at near-infrared wavelengths, enabling fast and efficient quantum networking.
Researchers have developed a long, needle-thin brain electrode with channels that enables neural signal recording and precisely targeted medication delivery across different brain regions. The technology has primarily been developed for basic research but may be important for future treatments in epilepsy and other neurological diseases.
Scientists at SwissFEL have developed a technique known as X-ray four-wave mixing, allowing them to access coherences in matter for the first time. This breakthrough has the potential to illuminate how quantum information is stored and lost, ultimately aiding the design of more error-tolerant quantum devices.
Researchers at Huazhong University of Science and Technology have implemented the first complete public-key encryption system at the physical optical layer. The innovation lies in integrating partially coherent light and reciprocity principles on a single photonic chip to conceal information within random optical fields.
Researchers at ETH Zurich developed nano-OLEDs with pixels measuring just 100 nanometres, enabling ultra-high-resolution displays and microscopes. The tiny light sources also have potential applications in sensors, optics, and information transmission.
Researchers propose IncepHoloRGB, a lightweight unsupervised CGH model generating high-definition RGB holograms through a unified framework. The model combines depth-traced superimposition and Inception sampling block to enhance computing efficiency and visual impression.
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.
A Caltech team led by Alireza Marandi has created a nanophotonic device that generates a frequency comb, a spectrum of evenly spaced laser-like light across a wide range of frequencies. This breakthrough offers potential in areas such as communications and spectroscopy.
Researchers mapped key aspects of electron pulses that can generate laser-like X-ray pulses, improving access to XFELs. The technique enables studying molecule behavior in detail and advancing fields like chemistry and medicine.
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.
The proposed scheme utilizes periodic structured light and engineered electron beams to achieve coherent inverse Compton scattering, resulting in significantly higher-intensity scattered photon beams. This technology has the potential to dramatically enhance beam intensity in the EUV and soft X-ray range.
Researchers developed world's first practical surface-emitting laser using quantum dots, advancing miniaturization and energy efficiency of light sources. The innovation enables high-performance, scalable structures and cost reductions through mass production.
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 Washington State University have discovered a hybrid zinc telluride-based material that undergoes structural changes when subjected to pressure, making it a strong candidate for phase change memory. The material's layered structure and directional sensitivity open the door to additional uses in photonics.
The study provides a new look at the galactic region surrounding our solar system, revealing a roughly uniform background Lyman alpha sky brightness. The findings suggest hot interstellar gas bubbles may be regions of enhanced hydrogen gas emissions at a wavelength called Lyman alpha.
Physicists at Harvard SEAS have created a compact, on-chip mid-infrared pulse generator that can emit short bursts of light without external components. This device has the potential to speed up gas sensor development and create new medical imaging tools.
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.
Northwestern University engineers developed the world's smallest pacemaker that can be non-invasively injected into newborn babies' hearts with a syringe. The device, paired with a wearable wireless controller, stimulates pacing through light pulses, dissolving after use without surgical extraction.
Scientists have developed a method to produce propylene through nonoxidative propane dehydrogenation (PDH) using light-driven nanoparticles. This process could reduce energy demands and emissions in the chemical industry, paving the way for a more sustainable future.
A new bilayer metasurface, made of two stacked layers of titanium dioxide nanostructures, has been created by Harvard researchers. This device can precisely control the behavior of light, including polarization, and opens up a new avenue for metasurfaces.
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 a compact, solid-state laser system that generates 193-nm coherent light, marking the first 193-nm vortex beam produced from a solid-state laser. This innovation enhances semiconductor lithography efficiency and opens new avenues for advanced manufacturing techniques.
A new method using terahertz radiation has been developed to accurately measure the water content in biogas produced during biomass recycling. This allows for efficient operation and reliable results over a wide range of water vapor concentrations and temperatures.
Researchers at Heriot-Watt University discovered a way to manipulate the optical properties of light by adding a new dimension—time. This breakthrough enables extraordinary light transformations, including amplification and quantum states, with ultra-fast pulses of light.
Scientists at Helmholtz-Zentrum Dresden-Rossendorf have developed a new method to determine the magnetic orientation of a material using terahertz light pulses. This technique enables reading out magnetic structures within picoseconds, opening up possibilities for ultrafast data storage and processing.
A new diagnostic method called flicker optoretinography (f-ORG) analyzes the retina's reaction to light, helping to detect danger before symptoms appear. The technique detects even minor changes in photoreceptors, providing valuable insights into retinal health.
Researchers have developed a method to control the color and frequency of light emitted from nanodots in 2D materials, which could be used to create higher-resolution monitors and faster quantum computers. By precisely controlling the excitons in these materials, scientists can manipulate the light they emit more effectively.
Researchers developed a tip-enhanced Raman spectroscopy platform to accurately identify molecular Raman scattering of glucose molecules. The platform improves the electric field intensity of a nanofocusing light source by two orders of magnitude, enhancing Raman scattering efficiency.
Researchers have set new limits on the lifetime of dark matter particles using a combination of models and state-of-the-art observations. The findings highlight the utility of their technology, setting an upper bound of ten to a hundred million times the age of the universe for the frequency of dark matter decay events.
Researchers developed a theoretical model predicting substantial increase in OLED brightness by leveraging polaritons, promising improved efficiency and brightness. The study proposes new materials discovery and architecture development to achieve single-molecule strong coupling or tailored molecules for polariton OLEDs.
Researchers at NC State University have developed a new technique to tune the optical properties of quantum dots using light, reducing energy consumption and environmental impact. This method allows for precise control over the bandgap, enabling the creation of high-quality perovskite quantum dots for optoelectronic devices.
A new study from DTU National Food Institute finds that temperature and light intensity play a crucial role in the yield of various nutrients produced by the microalga Nannochloropsis oceanica. The research suggests a two-stage cultivation process to optimize nutrient production, paving the way for sustainable food production.
Researchers used advanced X-ray techniques to study infinite-layer nickelates, a promising family of high-temperature superconductors. They found that magnetic fluctuations and spin excitations are present in these materials, regardless of the presence of a capping layer.
Researchers develop phase-matching-free technique for generating octave-spanning coherent broadband light using ultrathin crystals. The innovation produces a light source with superior coherence and efficiency compared to conventional methods.
Researchers propose a novel strategy for highly controllable micro-nano fabrication using focal volume optics in transparent solids. The approach enables the creation of composite structures with finer structures and tunable properties, opening up new avenues for photonics and nanophotonics applications.
Researchers developed a miniaturized all-fiber photoacoustic spectrometer for intravascular gas detection, achieving detection limits of 9 ppb and response times as quick as 18 milliseconds. The system detects trace gases at the ppb level and analyzes nanoliter-sized samples with millisecond response times.
A new noninvasive imaging method developed by MIT researchers can penetrate deeper into living tissue than previous techniques, producing richer and more detailed images. This breakthrough enhances biological research capabilities, enabling scientists to study immune responses and develop new medicines with greater accuracy.
Researchers have developed a new X-ray technique called XL-DOT that visualizes crystal grains, grain boundaries, and defects in materials, enabling previously inaccessible insights into functional materials. The technique uses polarized X-rays to probe the orientation of structural domains in three dimensions.
A commonly used mathematical approach to describe fluorescence evolution in solids cannot be applied to liquids, where molecules are free to move. This can lead to erroneous interpretations of experimental data and wrong conclusions.
Researchers developed a new authentication technology that uses Ge2Sb2Te5 thin films to encode covert information, which can be revealed using a simple reading device. The technology has potential applications in various industries and shows promise for widespread use.
Researchers demonstrated the quantum optical properties of high-harmonic generation in semiconductors, aligning with theoretical predictions. The experiment showed entanglement and squeezing in the emitted light, which are key resources for many quantum technologies.
A study published in PLOS ONE found that antimicrobial photodynamic therapy using annatto colorant was effective in treating halitosis in mouth-breathing children. The researchers used a LED light source to target the annatto, which generated reactive oxygen species that killed bacteria on the tongue, leading to improved oral health.
A team of researchers at Nagoya University has developed a way to make LEDs brighter while maintaining their efficiency. By tilting the InGaN layers and cutting the wafer into different orientations, they have found that LEDs with lower polarization but in the same direction as standard LEDs show greater efficiency at higher power.
Researchers at SwissFEL have achieved breakthroughs in improving the temporal coherence of XFEL pulses by inserting magnetic chicanes to control the timing of the electron beam. This advancement opens new scientific opportunities in fields requiring precise spectral control, such as fundamental physics and applied sciences.
Researchers from the University of Liverpool and international collaboration measure nuclear radius of nobleium and fermium isotopes using laser spectroscopy. The study reveals smooth trends in charge radii and reduced influence of shell effects at superheavy element levels.
An international team of researchers has confirmed the location of the oldest ochre mine in the world, dating back around 48,000 years. Ochre was found to have spread from the mine to nearby areas, revealing ancient extraction and transport networks.
A research group at Chuo University developed a method to induce deformations in polymer materials at specific depths using two-photon absorption. This enables versatile deformations and motions, enhancing the degree of freedom, and contributes to the development of small, lightweight, and soft robots.
Binghamton University researchers have created artificial plants that can capture 90% of carbon dioxide from indoor air, reducing levels and generating oxygen. The plants use photosynthesis to drive the process, with an additional power generation capability of around 140 microwatts.
Researchers at UCLA developed a new type of imaging technology that forms images in only one direction, enabling efficient and compact methods for asymmetric visual information processing and communication. The technology works exceptionally well under partially coherent light, achieving high-quality imaging with high power efficiency.
The study introduces a novel dynamic gas sensing platform using blue μLED-activated SnO2 nanoparticles, exhibiting excellent sensitivity, tunable selectivity, and rapid detection. The system can distinguish various gases under light illumination, contributing to healthier living environments.
Researchers have discovered a ferroelectric material that can adapt to light pulses on the nanoscale, creating networked nanodomains that can be reconfigured without requiring much energy. This discovery could lead to more energy-efficient computing systems and artificial neural networks.
Researchers found that light pollution disturbs moth behavior outside the illuminated area, causing them to fly in curvy paths. The study also revealed an interaction between artificial light and the moon's phase, affecting moths' orientation and flight patterns.
A novel LED device with alternating orange and blue wavelengths has been shown to effectively reset circadian clocks in humans. The study found that the light outpaced other devices in advancing melatonin levels, offering a new approach to counteract seasonal affective disorder.
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 at Brookhaven National Laboratory used X-ray absorption spectroscopy to study promethium, a rare and radioactive element. The team successfully observed promethium form chemical bonds with neighboring oxygen atoms in an aqueous solution, providing new insights into its complex chemistry.