ScienceDaily: Top Technology News |
- Shining a light on the elusive 'blackbody' of energy research: Designer material has potential applications for thermophotovoltaics
- Nanoplasmonic 'whispering gallery' breaks emission time record in semiconductors
- Astronomers discover largest and most distant reservoir of water yet
- The origin of comet material formed at high temperatures
| Posted: 22 Jul 2011 12:26 PM PDT A designer metamaterial can engineer emitted "blackbody" radiation, a feat that transcends many of the limits governing natural materials and an advance that could potentially lead to the development of new thermophotovoltaic technologies, researchers report.  |
| Nanoplasmonic 'whispering gallery' breaks emission time record in semiconductors Posted: 22 Jul 2011 10:28 AM PDT Renaissance architects demonstrated their understanding of geometry and physics when they built whispering galleries into their cathedrals. These circular chambers were designed to amplify and direct sound waves so that, when standing in the right spot, a whisper could be heard from across the room. Now, scientists have applied the same principle on the nanoscale to drastically reduce emission lifetime, a key property of semiconductors, which can lead to the development of new ultrafast photonic devices.  |
| Astronomers discover largest and most distant reservoir of water yet Posted: 22 Jul 2011 10:28 AM PDT Two teams of astronomers have discovered the largest and farthest reservoir of water ever detected in the universe. Looking from a distance of 30 billion trillion miles away into a quasar -- one of the brightest and most violent objects in the cosmos -- the researchers have found a mass of water vapor that's at least 140 trillion times that of all the water in the world's oceans combined.  |
| The origin of comet material formed at high temperatures Posted: 22 Jul 2011 10:02 AM PDT Comets are icy bodies, yet they are made of materials formed at very high temperatures. Where do these materials come from? Researchers have now provided the physical explanation behind this phenomenon. They have demonstrated how these materials migrated from the hottest parts of the solar system to its outer regions before entering the composition of comets.  |
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