New approach may be key to quantum dot solar cells with real gains in efficiency
(Phys.org) —Los Alamos researchers have demonstrated an almost four-fold boost of the carrier multiplication yield with nanoengineered quantum dots. Carrier multiplication is when a single photon can excite ...
New 'T-ray' tech converts light to sound for weapons detection, medical imaging
A device that essentially listens for light waves could help open up the last frontier of the electromagnetic spectrum—the terahertz range.
Thermal vision: Graphene light detector first to span infrared spectrum
The first room-temperature light detector that can sense the full infrared spectrum has the potential to put heat vision technology into a contact lens.
New solar cell technology captures high-energy photons more efficiently
(Phys.org) —Getting the blues is rarely a desirable experience—unless you're a solar cell, that is.
Astronomers reveal contents of mysterious black hole jets
An international team of astronomers has answered a long standing question about the enigmatic jets emitted by black holes, in research published today in prestigious journal Nature.
Topological light: Living on the edge
(Phys.org) —Topology—the understanding of how things are connected—remains abstract, even with the popular example of doughnuts and coffee cups. This concept, esoteric as it appears, is also neat because ...
Toward a truly white organic LED: Physicists develop polymer with tunable colors
By inserting platinum atoms into an organic semiconductor, University of Utah physicists were able to "tune" the plastic-like polymer to emit light of different colors – a step toward more efficient, less ...
Using solar energy to turn raw materials into ingredients for everyday life
(Phys.org) —Just about everything we touch in the course of a day - car, phone, computer, fridge, detergent - even medicines, rely on the chemical industry to turn raw materials such as petroleum by-products, ...
EU urged to convert TV frequencies to mobile broadband
The EU should convert a whole spectrum of television and radio frequencies for use by mobile broadband by around 2020 as smartphone use soars, a report said on Monday.
Socially-assistive robots help kids with autism learn by providing personalized prompts
This week, a team of researchers from the USC Viterbi School of Engineering will share results from a pilot study on the effects of using humanoid robots to help children with autism practice imitation behavior ...
Researchers unveil new solar cell made from carbon nanotubes that converts more sunlight into power
Towards more efficient solar cells
A layer of silicon nanocrystals and erbium ions may help solar cells to extract more energy from the ultraviolet (UV, high-energy) part of the solar spectrum. Experimental physicists from the FOM Foundation, ...
Monarch butterfly uses magnetic, Sun compasses, study finds (Update)
Each fall millions of monarch butterflies use a sophisticated navigation system to transverse 2,000 miles from breeding sites across the eastern United States to an overwintering habitat in specific groves ...
New quantum mechanism to trigger the emission of tunable light at terahertz frequencies
Scientists have found that two-dimensional (2D) nanostructures with asymmetric design enable a new quantum mechanism, triggering the emission of tunable light at terahertz frequencies—with unprecedented ...