Pingie: HTTP:: World 039 s First Spaser Unveiled

HTTP:: World 039 s First Spaser Unveiled
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Scientists from the Norfolk State University in Virginia, together with colleagues from the Purdue University, have recently showcased their latest nanolaser, which they say is the smallest in the world. The new device is, however, not a laser in the strictest terms. It is rather a “spaser,” a device that does not amplify light, but produces it itself. It is also the first spaser ever built, and the instrument holds great promise for the ultrafast nanocircuit technology. According to the team of constructors, the instrument is also fit to be used as a light source for scanning near-field optical microscopes, Nature News informs. The new spaser is so small that it can completely fit inside a silica sphere just 44 nanometers across, the team says, which means that it is about ten times smaller than the wavelength of visible light itself. Rather than amplifying light inside a mirrored cavity â€" the basic principle of an average laser â€" the spaser amplifies tiny oscill!
ations in the density of free electrons on the surface of metals, called plasmons, which are, in turn, responsible for generating light. Such a small light source has numerous types of applications waiting for it, ranging from scanning near-field optical microscopes to nanoscale circuits and nanolithography. In the latter, the new ...
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http://news.softpedia.com/news/World-039-s-First-Spaser-Unveiled-119360.shtml

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