Bright future for nanosized light source

A bio-friendly nano-sized light source capable of emitting coherent light
across the visible spectrum has been invented by researchers with the US
Department of Energy's Lawrence Berkeley National Laboratory, and the
University of California at Berkeley. Among the many potential applications
of this nano-sized light source, once the technology is refined, are single
cell endoscopy and other forms of subwavelength bio-imaging, integrated
circuitry for nanophotonic technology and new advanced methods of cyber
cryptography.