A simple new electron-beam multilayer deposition technique for creating intracavity contacts—an important component of gallium nitride-based (III-nitride) vertical-cavity surface-emitting lasers (VCSELs)—not only yields ...
General Physics
Oct 13, 2015
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43
Scientists working to design more robust and efficient catalysts have achieved a world first with the help of powerful imaging techniques at Diamond Light Source, the UK's synchrotron science facility. The team, which brings ...
Materials Science
Aug 5, 2015
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11
Ultrashort light pulses from modern lasers enable temporal resolution of even the fastest processes in molecules or solid-state materials. For example, chemical reactions can, in principle, be traced down to the 10-fs time ...
Optics & Photonics
Feb 11, 2015
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16
Engineers at Oregon State University have successfully shown that a continuous flow reactor can produce high-quality nanoparticles by using microwave-assisted heating – essentially the same forces that heat up leftover ...
Nanomaterials
Jun 10, 2014
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0
A team of researchers in Japan has developed a solid-state lamp that emits high-energy ultraviolet (UV) light at the shortest wavelengths ever recorded for such a device, from 140 to 220 nanometers. This is within the range ...
Condensed Matter
Apr 22, 2014
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0
(Phys.org) —Scientists at the U.S. Naval Research Laboratory (NRL) have suggested a method that could significantly increase the efficiency of green-blue-ultraviolet light-emitting diodes based on GaInN/GaN, AlGaN/GaN, ...
General Physics
Feb 20, 2014
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0
Solid-state lighting based on light-emitting diodes (LEDs) is the most efficient source of high color quality white light. Nevertheless, they show significant performance limitations such as the "efficiency droop". Blue laser ...
Optics & Photonics
Nov 11, 2013
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1
By determining simple guidelines, researchers at UC Santa Barbara's Solid State Lighting & Energy Center (SSLEC) have made it possible to optimize phosphors –– a key component in white LED lighting –– allowing for ...
General Physics
Oct 31, 2013
4
0
To maximise the efficiency of solar cells of the future, physicists are taking a leaf out of nature's book.
Biochemistry
Oct 25, 2013
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0
As a modern culture, we crave artificial white lights—the brighter the better, and ideally using less energy than ever before. To meet the ever-escalating demand for more lighting in more places and to improve the bulbs ...
General Physics
Sep 27, 2013
2
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