Scientists use lasers and carbon nanotubes to look inside living brains
(Phys.org) —A team of Stanford scientists has developed an entirely non-invasive technique that provides a view of blood flow in the brain. The tool could provide powerful insights into strokes and possibly ...
On-chip topological light: First measurements of transmission and delay
Topological transport of light is the photonic analog of topological electron flow in certain semiconductors. In the electron case, the current flows around the edge of the material but not through the bulk. ...
Creating optical cables out of thin air
Imagine being able to instantaneously run an optical cable or fiber to any point on earth, or even into space. That's what Howard Milchberg, professor of physics and electrical and computer engineering at ...
New non-metallic metamaterial enables team to 'compress' and contain light
The invention of fiber optics revolutionized the way we share information, allowing us to transmit data at volumes and speeds we'd only previously dreamed of.
Laser 'Lightning rods' channel electricity through thin air
By zapping the air with a pair of powerful laser bursts, researchers at the University of Arizona have created highly focused pathways that can channel electricity through the atmosphere.
Laser makes microscopes way cooler
(Phys.org) —Laser physicists have found a way to make atomic-force microscope probes 20 times more sensitive and capable of detecting forces as small as the weight of an individual virus.
Study offers insights into a new class of semiconducting materials
A new paper by University of Notre Dame researchers describes their investigations of the fundamental optical properties of a new class of semiconducting materials known as organic-inorganic "hybrid" perovskites.
NIST therapy for ultraviolet laser beams: Hydrogen-treated fibers
To make a better optical fiber for transmitting laser beams, the first idea that comes to mind is probably not a nice long hydrogen bath.
Catching chemistry in motion: Laser-timing tool works at the speed of electrons
(Phys.org) —Researchers at the Department of Energy's SLAC National Accelerator Laboratory have developed a laser-timing system that could allow scientists to take snapshots of electrons zipping around ...
Watching chemistry in motion: Chemical environments mapped using molecular vibrations
Scientists have long known that a molecule's behavior depends on its environment. Taking advantage of this phenomenon, a group of researchers at the University of Chicago developed a new technique to map ...
New technology to fabricate high-performance, flexible optical devices
A team of researchers at the University of Delaware has developed a way to fabricate high-performance flexible optical devices by combining chalcogenide glass and polymers.
Researchers seek broadband/multiband electromagnetic absorbers based on plasmonic and metamaterial structures
Early research on electromagnetic (EM) absorbers dates back to 1902 when Wood observed the anomalous dips in the reflection spectra of metallic gratings under illumination of a white-light source. EM wave absorbers are devices ...
The first direct-diode laser bright enough to cut and weld metal
Diode lasers—used in laser pointers, barcode scanners, DVD players, and other low-power applications—are perhaps the most efficient, compact, and low-cost lasers available.
'Comb on a chip' powers new atomic clock design
Researchers from the National Institute of Standards and Technology (NIST) and California Institute of Technology (Caltech) have demonstrated a new design for an atomic clock that is based on a chip-scale ...