A road of no return: Team implements the first '1-way roads' for light
Light readily bounces off obstacles in its path. Some of these reflections are captured by our eyes, thus participating in the visual perception of the objects around us. In contrast to this usual behavior ...
When the speed of light depends on its direction
Light does not travel at the same speed in all directions under the effect of an electromagnetic field. Although predicted by theory, this counter-intuitive effect has for the first time been demonstrated ...
Researchers find way to measure speed of spinning object using light's orbital angular momentum
Discovery of a new mechanism for wavelength conversion of light by a plastic material
Researchers from the National Institute of Radiological Sciences have discovered a new mechanism for wavelength conversion of emitted light by a plastic material. The results of these studies appeared in ...
A breakthrough in creating invisibility cloaks, stealth technology
Controlling and bending light around an object so it appears invisible to the naked eye is the theory behind fictional invisibility cloaks.
Research group creates longer lived and more efficient quantum memory
The paths of photons are random, but coordinated
(Phys.org)—Researchers at the Niels Bohr Institute have demonstrated that photons (light particles) emitted from light sources embedded in a complex and disordered structure are able to mutually coordinate ...
Authors explore security threat of covert acoustical mesh networks in air
UA engineer designs better error-correction code
(PhysOrg.com) -- One company already has licensed the technology from the UA, and patents are pending to meet growing computer industry demand for the error-correction algorithm developed by Bane Vasic.
Mathematician models the spread—and prevention—of crime as a wave
(Phys.org)—Crime can happen anywhere, but it usually doesn't. Researchers have noticed that criminal activity seems to be concentrated in self-perpetuating hotspots. Crime leads to more crime. Then, from ...
Hiding objects with a terahertz invisibility cloak
Researchers at Northwestern University have created a new kind of cloaking material that can render objects invisible in the terahertz range.
Researchers observe speed of propagation in non-relativistic lattice
Hiding in plain sight
A couple years ago, researchers introduced a new material that they said could make any object invisible to both radar and the human eye. Invisibility cloaking would have a major impact on defense technology, they explained, ...
Research outlines math framework that could help convert 'junk' energy into useful power
A University at Buffalo-led research team has developed a mathematical framework that could one day form the basis of technologies that turn road vibrations, airport runway noise and other "junk" energy into ...