Researchers at Arizona State University and Technical University of Eindhoven in the Netherlands have been collaborating on a project to make lasers significantly smaller than the ones that are currently available, by finding a way around the traditionally accepted diffraction limit -- the idea that the size of lasers in any one dimension (say, thickness) is limited to half of the wavelength involved. One way around the size limitation, they've found, is to use a combination of semiconductors and metals like gold and s
