The demonstration of electroluminescence at terahertz frequencies from a silicon-germanium device marks a key step towards the long-sought goal of a silicon-based laser.
Addressing the increasing demand to accurately measure acceleration in smaller navigation systems and other devices, researchers at the National Institute of Standards and Technology (NIST) have developed an accelerometer a mere millimeter thick that uses laser light instead of mechanical strain to produce a signal.
Researchers at the Beckman Institute have developed a new variation of an infrared microscope with analytical capabilities, rendering it effective for probing the chemical conformations of biomolecules. Their work was published in Analytical Chemistry and featured on the cover.
Tiny fluorescent semiconductor dots, called quantum dots, are useful in a variety of health and electronic technologies but are made of toxic, expensive metals. Nontoxic and economic carbon-based dots are easy to produce, but they emit less light. A new study that uses ultrafast nanometric imaging found good and bad emitters among populations of carbon dots. This observation suggests that by selecting only super-emitters, carbon nanodots can be purified to replace toxic metal quantum dots in many applications, the researchers said.
By reducing heat leakage, NC State engineers improve wearable device powered by body heat.
Dr Bran Knowles, a senior lecturer in data science at Lancaster University, says: "I'm certain that the public are incapable of determining the trustworthiness of individual AIs... but we don't need them to do this. It's not their responsibility to keep AI honest."
A research group led by KAUST Associate Professor Andrea Fratalocchi has discovered that silicon nanoshapes act as feed-forward neural networks with the ability to be trained in a supervised learning model to perform user-defined tasks at lightspeed. The new flat optics opens the door to a major technological revolution by offering small, cheap, flexible alternatives to current processors and to an entirely new generation of devices.
Researchers in the UK have developed a way to coax microscopic particles and droplets into precise patterns by harnessing the power of sound in air. The implications for printing, especially in the fields of medicine and electronics, are far-reaching.
A team of researchers from Nagoya University, Japan, and Technical University of Darmstadt have developed a technique for quantitatively studying the effect of light on nanoscale mechanical properties of thin wafers of semiconductors or any other crystalline material. The group has found clear evidence that propagation of dislocations - slippages of crystal planes - in semiconductors is suppressed by light. The likely cause is interaction between dislocations and electrons and holes excited by the light.
University of Tsukuba and Institute of High Pressure Physics scientists mapped the spin-density distribution of electrons travelling through a molybdenum disulfide transistor cooled to almost absolute zero. This work may help advance the field of spin-based electronics that would be faster and more efficient compared with current devices.