Observation backs up model of Z-shaped radio sources
Transparent particles with extraordinarily high refractive indices can become almost invisible at wavelengths longer than the particle size, an ASTAR-led theoretical study has shown. The discovery challenges the accepted wisdom around the limits of light scattering and visibility, and could lead to a new class of 'invisible' materials.
Scientists protest devastating spending cuts
To celebrate a half-century of discovery, Fermilab has been gathering tales of life at the lab.
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a phenomenon similar to an effect observed in circular galleries, such as in some...Show More Summary
To celebrate a half-century of discovery, Fermilab has been gathering tales of life at the lab. Science stories usually catch the eye when there’s big news: the discovery of gravitational waves, the appearance of a new particle. ButShow More Summary
Devices that allow to route microwave signals are essential engineering tools. In particular, isolators, which let signals flow in one direction but block them in the other, are needed to protect sensitive equipment from harm. Now, scientists...Show More Summary
Fluorescence microscopy gives researchers incredible power to illuminate the tiniest structures and capture the real-time activities of live cells by tagging biological molecules with a veritable rainbow of fluorescent dyes. This power comes at a cost: The technology can be expensive and time-consuming and, so far, has resisted attempts at automation.
Two spectroscopic probes are combined to measure the “softness” of collisions between cold atoms. [Physics] Published Tue Sep 19, 2017
The beautiful sound of birdsongs emerging from the trees is a wonderful example of how much nature can still teach us, even as much about their origins are still mysterious to us. About 40 percent of bird species learn to vocalize when they are exposed to a tutor, a behavior of interest to many neurologists and neurobiologists. Show More Summary
Canadian and US researchers have taken an important step towards enabling quantum networks to be cost-effective and truly secure from attack.
Workshop: 16 Oct 2017, London, United Kingdom.
Lecture/talk: 13 Dec 2017, United Kingdom.
Light travels fast – sometimes a little too fast when it comes to data processing.
Researchers from the Moscow Institute of Physics and Technology and the University of Siegen have explained the mechanism of single-photon generation in diamond diodes. Their findings, published in Physical Review Applied, offer new avenues for the development of high-speed single-photon sources for quantum communication networks and quantum computers of the future.
Calculations predict new type of material for spintronics
Today, electrical bistable devices are the foundation of digital electronics, serving as building blocks of switches, logic gates and memories in computer systems. However, the bandwidth of these electronic computers is limited by the signal delay of time constants important to electronic logic operations. Show More Summary
Thermoelectric materials are considered a key resource for the future - able to produce electricity from sources of heat that would otherwise go to waste, from power plants, vehicle tailpipes and elsewhere, without generating additional greenhouse gases. Show More Summary
Author(s): Peter M. Celliers and Jon H. Eggert Measurements of the melting curve of hydrogen at unprecedentedly high pressures call for a refinement of the theories describing the material. [Physics 10, 101] Published Mon Sep 18, 20...
Two-dimensional materials called molecular aggregates are very effective light emitters that work on a different principle than typical organic light-emitting diodes (OLEDs) or quantum dots. But their potential as components for new kinds of optoelectronic devices has been limited by their relatively slow response time. Show More Summary