Lasers Tune Quantum Dots
GAITHERSBURG, Md., Aug. 20, 2008 – In what could be a key development in cryptography applications, researchers from the National Institute of Standards and Technology (NIST) and the Joint Quantum Institute (JQI), a collaborative center of the University of Maryland and NIST, have found a way to reduce light scattering from quantum dots by manipulating them with lasers. This new technique improves quantum dots as a source of pairs of “entangled” photons, which are a peculiar consequence of quantum mechanics. Tricky to generate,...