May 2, 2003
IBM's New Chip Trips the Light
Eric Peterson writes "What Big Blue unveiled is a red nanosize LED. The researchers fire electrons into one end of a 1.4-nanomter-wide tube, and positively charged electrons, called holes, into the other end. When the electrons and the holes meet, they annihilate each other in bursts of infrared light. This light happens to be the same wavelength as the pulses now zipping through fiber-optic systems, but other colors could be generated with bigger or smaller nanotubes, says Avouris."