Articles tagged with Light Refraction
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Scientists have created a method to switch on and off the spontaneous emission of light by quantum dots at will, with pulses as short as 200 picoseconds. This technique has potential applications in quantum information transmission and control.
Scientists at the University of Cambridge have created a technique for building materials using light, allowing for the production of metamaterials that can control light interactions. This breakthrough has significant potential applications in sensing and military stealth technology.
A team of researchers in China has created a new artificial surface that can bend and focus electromagnetic waves like an antenna. The breakthrough, described as the first broadband transformation optics metasurface lens, may lead to flat or ultra-low profile antennas.
A team of Belgian researchers successfully developed a stretchable optical interconnection that can be bent and stretched without losing its light-gathering ability. The new material consists of a transparent core surrounded by a lower refractive index layer, which traps light and causes it to propagate along its length.
Researchers at Chalmers University of Technology have discovered that misfolded amyloid proteins react to multiphoton irradiation, opening up possibilities for new materials and technologies. These protein aggregates can be tuned for specific purposes and are as hard as steel, but with unique characteristics.
Researchers at Berkeley Lab created a zero-index metamaterial that generates phase mismatch-free nonlinear light, holding promise for future quantum computing and networking. The material features a fishnet structure and has been shown to preserve optical momentum conservation in all directions.
Researchers create novel concept using metamaterial to study quantum entanglement and complex relationships between photons. The system enables precise measurements without losing photons, providing a deeper understanding of the transition zone between classical and quantum physics.
Researchers at UC Santa Barbara discovered that female common market squid possess two distinct systems for reflecting light: Bragg reflection and Mie scattering. These systems allow the squid to switch between transparent and white colors, with the latter appearing as a result of condensation and dehydration of reflectins-based proteins.
Researchers at Cornell University captured high-resolution images of oscillating water drops, revealing 30 shapes and behaviors. The study's findings could improve inkjet printing resolution and inform applications in microfluidics and NASA research.
Researchers have developed a new artificial lens that mimics the natural lens of the human eye, enabling incremental refraction control. This breakthrough could improve performance in implantable lenses and consumer vision products, as well as enhance ground and aerial surveillance technology.
Researchers at EPFL's Computer Graphics and Geometry Laboratory have created an algorithm to control the 'caustic' effect, a natural optical phenomenon that generates clear images on transparent surfaces. The technique allows for the creation of complex representations such as faces or landscapes from simple forms like stars.
The photon sieve, a variant of Fresnel zone plate, focuses light through diffraction to create high-resolution images. The technology has been successfully demonstrated in ground tests and is set to be deployed on a Cubesat satellite, offering a game-changing solution for space-based imaging.
Purdue researchers create new metamaterials by replacing traditional metals with aluminum-doped zinc oxide, offering improved performance and semiconductor compatibility. This breakthrough enables the development of ultra-powerful microscopes, advanced sensors, and more efficient solar collectors.
A recent study has found that healthy emmetropic women have wider pupil diameters than men. The research analyzed anatomical indexes in a large sample of 379 emmetropic subjects, revealing differences between gender.
Researchers at Ames Laboratory have designed a method to evaluate different conductors for use in metamaterial structures. The team evaluated various conducting materials, including graphene and high-temperature superconductors, but found that silver and gold remain the best conductors for use in metamaterials.
Tony McCaffrey's generic parts technique (GPT) helps people think beyond common uses of objects, leading to 67% more problem-solving successes. By breaking down objects into parts and asking two questions, individuals can find alternative uses and innovate.
A study by Marie Brenner and colleagues found that contact lenses improve retinal nerve fiber layer measurements in patients with higher refractive errors but have a negative impact on those with lower refractive errors. The researchers aim to improve glaucoma diagnosis and management through their findings.
Researchers at Purdue University have developed nanoantennas that precisely manipulate light, allowing for the alteration of its phase and propagation direction. This enables potential applications in steering and shaping laser beams, nanocircuits for computers, and powerful lenses for microscopes.
Researchers at UC San Diego have developed a new method for simulating rainbows, including primary, secondary, and twinned rainbows, using improved models of light interaction with water drops. The study provides an almost complete picture of how rainbows form, shedding new light on their physics.
Researchers at the University of Michigan have developed a method to make 3D objects invisible using carbon nanotube forests. By growing a forest of low-density aligned carbon nanotubes on top of an object, it can absorb light and scatter reflections, effectively camouflaging its structure.
Researchers have created a novel metamaterial structure that can 'steer' second-harmonic light, allowing for unprecedented control over light manipulation. This breakthrough has significant implications for all-optical communications and could transform telecommunications technologies.
A team of researchers at Northwestern University has created a terahertz invisibility cloak that manipulates light to render objects invisible in the terahertz range. This design could have implications for biomedical research, security and communication.
AquaLux 3D uses precisely controlled water droplets to create 3D images in water, allowing for unique effects like video games on falling water. The technology can also enable physical interaction with the display.
A Caltech-led team has engineered a simple yet versatile material that bends light in the 'wrong' direction, making it ideal for efficient light collection in solar cells. The novel negative-index metamaterial can handle light with any polarization over a broad range of incident angles.
Researchers at Purdue University have created a new type of invisibility cloak that works for all colors of the visible spectrum. The device uses a tapered optical waveguide and has been shown to cloak an area 100 times larger than the wavelength of light, making it possible to cloak larger objects.
Researchers have developed a flexible light-sensitive material that can revolutionize photography and other imaging technologies by eliminating image distortion. Inspired by the human eye, the curved photodetector can correct distortion and produce sharper images.
Researchers have created a material that can reflect light from all angles, overcoming optical singularities. This breakthrough could lead to the development of perfect cat's eyes and invisibility devices. The discovery is based on transformation optics and has potential applications in wireless technology and radar.
Scientists at the University of Michigan and Princeton University have discovered a way to enhance light output in organic light-emitting devices, emitting approximately 70 lumens from a single watt of power. This innovation pushes more appealing white light, reducing energy consumption and reliance on coal-generated electricity.
Researchers at NIST create a system to compare photon travel times with sub-femtosecond accuracy, finding significant differences in time it takes photons to pass through materials with different refractive layer arrangements. This technique could provide empirical answers to long-standing puzzles about light's behavior in narrow gaps.
Scientists at Cardiff University developed an industrial lens with nanoscopic structures to capture more light in low-light environments. The lens has potential uses in optoelectronics, photovoltaics, fibre optics, sensors, and medical diagnostic devices.
Researchers reproduced Thomas Young's experiment in a hydrogen molecule using electrons and X-rays, revealing wave-like behavior that suggests a quantum nature. The findings provide insight into the transition between classical and quantum physics, with potential implications for quantum cryptography and computation.
Researchers at Simon Fraser University created a material with extremely high birefringence, surpassing that of calcite. This achievement is made possible by the design flexibility of coordination polymers, which can be tailored to exhibit specific optical properties.
Researchers have created a layered material that causes light to refract in the opposite direction, enabling flat lenses and potentially capturing images of DNA molecules. This technology, developed at NSF-funded research centers, holds promise for various applications such as chemical threat sensors and medical diagnostics.
Brookhaven researchers developed a compound kinoform lens to surpass the critical angle limit, enabling efficient focusing of x-rays down to extremely small spots. This breakthrough advances nanoscience, energy, biology, and materials research with potential applications in alternative-energy technologies and new drug development.
The new high-performance mirror, called the high-index contrast sub-wavelength grating (HCG), packs the same reflective punch as current mirrors but is at least 20 times thinner. This characteristic presents critical advantages for today's ever smaller integrated optical devices.
Testing preterm children's eyes at 2.5 years of age may help identify those who will develop vision problems by age 10. The study found that refractive errors, including astigmatism and anisometropia, were more common in preterm children than full-term children.
A recent study estimates that 1 in 8 individuals aged 12+ in the US have impaired vision, with a prevalence of 6.4%. The majority can achieve good corrected visual acuity, but disparities exist among certain groups.
The study found no differences in visual acuity, contrast sensitivity, or perception of stray light between the two types of LASIK. Bladeless LASIK showed greater corneal backscatter initially, but patients perceived no difference in vision after three months.
Researchers measured key properties of liquids using immersion lithography, including refractive index and molecular size. The NIST report provides useful trends and data to help identify suitable liquids or calibrate measurements.
Researchers used point-contact spectroscopy to explore Andreev reflection between a normal metal and a heavy-fermion superconductor. The findings show that conventional theories cannot account for the data, indicating the need for new theoretical frameworks.
The Nanophotonics Group at Cornell University has developed tools to guide and switch light in low-index materials, including air or a vacuum. This technology enables the use of a wide variety of low-index materials, including polymers, and could speed up the day when home use of fiber-optic lines becomes practical.