New type of low-energy nanolaser that shines in all directions

Researchers in Eindhoven have developed a new type of low-energy, nanoscale laser that shines in all directions. The key to its omnidirectional light emission is the introduction of something that is usually highly undesirable in nanotechnology: irregularities in the materials. The researchers foresee a vast range of potential applications, but first they hope their fundamental…

Laser-pointing system could help tiny satellites transmit data to Earth

A new laser-pointing platform developed at MIT may help launch miniature satellites into the high-rate data game. Since 1998, almost 2,000 shoebox-sized satellites known as CubeSats have been launched into space. Due to their petite frame and the fact that they can be made from off-the-shelf parts, CubeSats are significantly more affordable to build and…

Researchers map light and sound wave interactions in optical fibers

Optical fibers make the internet happen. They are fine threads of glass, as thin as a human hair, produced to transmit light. Optical fibers carry thousands of Giga bits of data per second across the world and back. The same fibers also guide ultrasound waves, somewhat similar to those used in medical imaging. These two…

Application of laser welding technology on glass

Technical background With the rapid development of laser technology, lasers are widely used in welding various materials. As a transparent and brittle brittle material, the traditional laser light source cannot be easily absorbed by the glass, and the heat absorbing glass is not suitable for processing by conventional laser welding because of its large thermal expansion…

Adaptive optics, angiography pair to image deep into the retina

Combining adaptive optics and angiography, a team of researchers at the National Eye Institute (NEI; Bethesda, MD) can see live neurons, epithelial cells, and blood vessels deep in the eye’s light-sensing retina. Resolving these tissues and cells in the outermost region of the retina in such unprecedented detail shows promise for better detection and treatment…

Air Flow Control for Remote Laser Beam Welding

Developers and users of industrial remote laser beam welding applications are often faced with different challenges under the conditions of series production. First, those applications are preferably conducted without any localized gas shielding, and therefore, specific interactions between the laser radiation and the welding fumes are very likely to occur, causing an impairment of the…

Photonic crystal sharply bends light without backscattering losses

Engineers at Duke University (Durham, NC) have demonstrated a photonic-crystal (PhC)-based device that can direct photons around sharp corners with virtually no losses due to backscattering, a key property that will be needed if electronics are ever to be replaced by photonic devices. The result was achieved with PhCs built on the concept of topological…

Hackers are looking forward to you Holidays for easy gain

Imagine if a hacker shut down the baggage handling system of one of the world’s busiest airports. Or took control of a fleet of autonomous delivery trucks and re-routed them to disrupt rush hour traffic in a major metropolis. What if the hacker then demanded a ransom to unlock the digital networks they’d hijacked? According…