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Nature 447, 385-386 (24 May 2007) | doi:10.1038/447385a; Published online 23 May 2007
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Laser technology: Less excitement for more gain
Todd D. Krauss1
Abstract
In theory, semiconductor nanocrystals are highly suitable laser materials, not least because the colour of their light is tunable over a wide range. In practice, they are difficult — but not impossible — to deal with.
At the heart of any laser is a material that, when 'pumped' by an external energy source, amplifies a light beam. Colloidal semiconductor nanocrystals are particularly promising materials for a new and improved generation of lasers, but attempts over the past decade to construct efficient lasers out of them have proved frustrating: optical amplification was observed only under the most extreme and impractical of pumping conditions1.
- Todd D. Krauss is in the Department of Chemistry, University of Rochester, Box 270216, Rochester, New York 14627-0216, USA.
Email: krauss@chem.rochester.edu
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