Articles tagged with Laser Light
The National Institute of Standards and Technology (NIST) has developed a novel chip-scale instrument using carbon nanotubes to measure laser power with high accuracy. The mini-radiometer achieves this by absorbing light over a broad range of wavelengths and converting it to heat, allowing for precise measurements.
Researchers developed a bio-inspired coating that enhances LED light extraction by up to 55 percent. The innovative design mimics the natural structure of firefly lanterns, which reduces internal reflections and allows more light to escape, ultimately making LEDs brighter while using less energy.
Rice University researchers have found a way to selectively heat diverse nanoparticles using short laser pulses. They demonstrated the effect in common gold nanoparticles, nanoparticle clusters, and mixed nanorods and nanoshells, showing narrow photothermal spectra and spectral selectivity.
A new therapeutic ultrasound approach converts light to sound, focusing high-pressure waves to finer points than ever before. The device can blast and cut with pressure, rather than heat, potentially operating painlessly.
Researchers at Rice University have created a method to trigger biochemical reactions remotely on demand by exposing plasmonic gold nanoparticles to near-infrared light, enabling chemical processes to occur at lower temperatures. This technology has great potential for industrial applications, including energy savings and more sustaina...
Researchers at Caltech developed a new waveguide that channels light and focuses surface plasmon polaritons to achieve nanoscale precision. The device has the potential to revolutionize biological imaging and computer storage by allowing for high-resolution maps of molecules and increased memory capacity.
Researchers found that blackbody radiation shifts caused by surrounding chamber temperature can impose limits on atomic clock precision. The study, led by Charles Clark and Marianna Safronova, explores how ytterbium atoms are affected by this faint form of influence, crucial for future clock recalibrations.
A new diffraction spectrometer uses a webcam and diffraction grating to achieve sub-picometer accuracy in laser tuning. The instrument is simple enough for undergraduate physics labs, providing training in optics and the wave nature of light.
Curiosity rover analyzed its first solid sample of Mars using the Sample Analysis at Mars (SAM) instrument suite. The analysis included separating molecules, identifying chemicals, and detecting volatiles and isotopes to search for signs of life.
Researchers challenge a long-held hypothesis on water's surface charge, finding that intrinsic properties of water molecules are responsible. Using advanced techniques like nonlinear optics and light diffusion, scientists detect negative charges even in the absence of impurities.
Scientists have developed a method to prevent 'light shifts' in atomic energy levels using pulsed radiation. The 'hyper' Ramsey excitation scheme suppresses the effect, allowing for more accurate measurements and potentially greater accuracy in optical clocks.
Researchers have developed new tiny probes called BRIGHTs that bind to biomarkers of disease and light up to reveal their location when swept by an infrared laser. These probes, made of gold nanoparticles with Raman reporters, create an electromagnetic hotspot that boosts the reporters' emission by a factor of nearly a trillion.
Researchers have created self-bending light beams that can move along curved paths and heal themselves, potentially using them to manipulate particles and data. Meanwhile, scientists have also designed ultralight fractal materials that could be used to build solar sails with reduced weight, potentially improving space propulsion.
Researchers at the University of Innsbruck propose a novel method for powering lasers through heat, which could provide internal cooling and revolutionize microchip technology. The concept involves using temperature gradients to separate cold and warm areas in the laser, allowing for efficient energy transfer.
Scientists at Vienna University of Technology propose a new measuring method using the forward calorimeter at CERN, enabling the creation of the world's most precise stopwatch for light pulses. This could revolutionize quark-gluon plasma physics and open up new avenues for nuclear research.
Researchers at Caltech engineer a new class of microsensors using laser light, enabling detection of motions in tens of microseconds. The sensors can measure both extremely small and large accelerations, making them valuable for various applications including oil and gas exploration and biomedical uses.
Researchers at University of Luxembourg develop method to observe and prevent solar cell degradation before production, improving industry efficiency. Thin film solar cells can be degraded during production, but new findings show it's reversible with quick treatment.
Two teams explore using natural silk for implantable sensors, compostable lasers, and microfibers integrated into photonic chips. Silk's optical properties make it an attractive material for biocompatible and biodegradable applications.
A compact, portable Raman spectrometer using a green laser pointer detects extremely minute traces of hazardous chemicals in real-time. The system's modular design enables rapid field deployment to disaster zones and areas with security concerns.
Montserrat Fernández-Vallejo has developed the longest fibre-optic sensor network measuring 250 km with a multiplexing capability, enabling remote monitoring of large infrastructures. The network addresses three main challenges: multiplexing sensors, ensuring continued service in case of faults, and allowing remote monitoring.
Researchers in Dresden observed how electrons in individual quantum dots absorb energy and emit it as light. They used scanning near-field microscopy to excite electrons and measure their energy levels.
Researchers created photoluminescent nanoparticles that shine clearly through over 3 centimeters of biological tissue. The particles, made with calcium-fluoride shells and thulium core, provide high-contrast imaging without adverse effects.
A prototype sensor array worn on the chest automatically creates a digital map of the wearer's environment, recognizing movement between floors. The system is envisioned as a tool to help emergency responders coordinate disaster response by providing accurate location estimates and visual features of the surroundings.
Griffith University researchers have developed a new technique for ultra-precise motion tracking using quantum-enhanced optical phase tracking. By combining
Researchers at the University of Pennsylvania have developed an all-optical photonic switch made from cadmium sulfide nanowires, enabling faster and more efficient light manipulation. This breakthrough paves the way for significant advancements in photonics and its applications in computing.
A University of Central Florida research team has created a 67-attosecond laser pulse, allowing scientists to watch electrons move in atoms and molecules. The technique, called Double Optical Grating, enables extreme ultraviolet light to be concentrated into the shortest possible pulse.
UCF researchers have made a breakthrough in nanotechnology by developing nanoclusters that can diffuse high-energy laser beams. These tiny clusters of gold particles have the potential to protect pilots and sensitive equipment from destructive lasers, providing a new level of safety for these applications.
Researchers successfully probed the effects of light on matter at the atomic scale by mixing x-ray and optical light waves. This technique allows them to directly measure how light manipulates chemical bonds in materials, enabling new insights into light-matter interactions.
Kansas State University professor Matthias Kling has received a $750,000 award to study electron dynamics in nanostructures with strong laser fields. His research could lead to speeding up electrons by a factor of 100,000, improving communication technology.
Researchers at Harvard University have created an ultrathin flat lens that focuses light without imparting distortions, approaching the physical limit set by diffraction laws. The device is scalable and simple to manufacture, making it a promising new technology for fiber-optic communications.
A new super-resolution microscope will be built at the University of Houston with a $1 million grant, allowing scientists to study the chemical properties of surfaces more accurately. The device combines sum frequency generation and compressive sensing imaging techniques to provide detailed data on surface reactions.
Researchers at Clemson University have developed optical fibers using highly purified silica and sapphire, pushing the limits of current fiber technology. The goal is to create stronger and more durable fiber material for telecommunications and high-energy applications.
Researchers have successfully produced and implemented single particles of light into a quantum key distribution link, enabling secure communication networks. The experiment uses semiconductor nanostructures to emit single photons with high efficiency, making it possible to transmit keys over longer distances without interception.
A team of scientists aims to create novel materials that change shape in response to external stimuli like heat or light. The researchers will use high-throughput techniques to identify components that can be combined to produce interesting effects.
Researchers at HZDR demonstrate proton acceleration in the direction of the laser light, achieving unprecedented high energies. This breakthrough enables future cancer therapy applications with ultra-short pulse lasers.
Researchers at the University of Washington have developed a plasma-based technology that produces high-energy light, which can be used to etch next-generation microchips with 13.5-nanometer wavelengths. This breakthrough has the potential to overcome the industry's current limitations and enable further miniaturization of electronics.
Researchers from CCNY and UC Berkeley have created rewritable computer chips using a beam of light. The technique, published in Nature Communications, uses laser light to control the spin of an atom's nucleus for encoding information.
Caltech engineers enable focusing of light deep into biological tissue, opening up possibilities for non-invasive diagnoses and treatments. The technique uses ultrasound waves to shift the frequency of light, allowing for image creation without scattering effects.
Researchers at Berkeley Lab develop 3D optical cavities with potential to generate intense nanolaser beams, suitable for various technologies including LEDs and optical sensing. The unique electromagnetic properties of these cavities enable new approaches for designing nano-scale optical cavities.
Scientists have demonstrated that they can control the length and height of plasmons on graphene using an electrical circuit, opening up possibilities for information processing in tight spaces. This breakthrough uses infrared light to excite surface plasmons with wavelengths as short as 100 nanometers.
Researchers estimate that ice may make up 22 percent of Shackleton crater's surface material using laser light from NASA's Lunar Reconnaissance Orbiter. The team discovered the crater's floor is brighter than nearby craters, indicating possible ice presence.
An international team produced a coherent beam that includes X-rays for the first time using a setup on a laboratory table. The researchers converted part of the original laser energy into a super-continuum of light extending well into the X-ray region, enabling the study of fastest physical processes in nature.
A research team at CU-Boulder has generated laser-like beams of X-rays from a tabletop device, enabling super-high-resolution imaging and providing insights into the nanoworld. The breakthrough device uses atoms in a gas to efficiently combine low-energy photons, generating high-energy X-ray photons.
A new imaging technology captures unprecedented speed and precision of embryogenesis, enabling quantitative analyses of developmental processes. The SiMView light sheet microscope allows users to track each cell in an embryo as it takes shape over hours or days.
Iowa State researchers have found a new photo-excited graphene state characterized by broadband population inversion of electrons, resulting in optical gain. This discovery could enable the development of efficient amplifiers and opto-electronics devices.
Researchers at Joint Quantum Institute store and replay two separate images, a feat of cinematography, using a room-temperature vapor of atoms. The new storage process has great promise for quantum information and may lead to the development of a random access memory for continuous variable quantum information.
Physicists have successfully trapped and cooled exotic particles called excitons, condensing them into a giant matter wave that coheres at extremely low temperatures. This breakthrough allows scientists to better study the physical properties of excitons, promising applications in efficient solar energy harvesting and ultrafast computing.
A team of American researchers has created an array of 25,000 individual invisibility cloaks that can slow down or stop light, creating a trapped rainbow. This technology enables 'spectroscopy on-a-chip' for detailed analysis of biological materials.
Researchers at Stanford and Penn have developed an invisible photodetector that uses plasmonic cloaking to detect light. The device features silicon nanowires covered by a thin gold cap, which cancels out reflected light through destructive interference, rendering the device invisible.
Scientists have extended the trapped particles' useful life more than tenfold by using a refined technique for trapping and manipulating nanoparticles. The new approach, which involves a control and feedback system that nudges the nanoparticle only when needed, increases the lifetime of the particle while reducing its tendency to wander.
Researchers at NIST have developed a novel method for generating superluminal light pulses through four-wave mixing, which can be used to improve communication timing and investigate quantum correlations. The technique introduces cleaner, less noisy pulses with increased speed, potentially enabling faster-than-light information transfer.
Physicists create isolated attosecond pulses using a new method dubbed the "attosecond lighthouse" effect, which can help confirm theories of electron motion and yield insights into chemical reactions. The technique has several advantages over previous methods, including ease of implementation and minimal rotation required.
A new prototype technology demonstrates all three primary laser colors coming from one material. This breakthrough could lead to making products such as high-performance digital displays that employ a variety of laser colors.
Researchers at Vienna University of Technology and other institutions discovered that coupling two micro-lasers can lead to a total shutdown of light emission, defying the expectation that more energy would increase brightness
Researchers developed a new way to rapidly create single photons by exciting ultra-cold rubidium gas with lasers. This allows for the reliable production of single photons with well-known properties, important for various research areas including quantum information systems and studying dynamics and disorder in physical systems.
The NIST mini-sensor successfully measured alpha waves in the brain and signals resulting from hand stimulation, verifying its potential for biomedical applications. It may be useful in magnetoencephalography (MEG), a noninvasive procedure measuring magnetic fields produced by electrical activity in the brain.
The new laser design relies on a million rubidium atoms doing synchronized line dances to produce dim but brighter laser light. The superradiant laser's stability is less sensitive to mirror motion, making it potentially 1,000-fold more stable than conventional lasers.
Researchers created light at multiple frequencies by mixing high- and low-frequency lasers, producing new colors. The phenomenon has potential applications in increasing data transfer speed and communication.
Photoacoustic tomography allows scientists to see deep beneath the skin with high contrast, revealing tissue oxygen use and cancer biomarkers. The technique enables non-invasive imaging for breast cancer staging, early chemotherapy response monitoring, melanoma detection, and gastrointestinal tract visualization.
Researchers at MIT Media Lab have developed a new imaging system that can produce recognizable 3-D images of objects outside its line of sight by using femtosecond laser pulses and analyzing reflected light. The system has potential applications in emergency response, vehicle navigation, and medical devices.