World's Smallest Diamond Ring is For Computing, Not Your Fiancée

It might look kinda grey and boring, but the tiny ring in that image is a world-beater: it measures just five microns across, and is only 300 nanometers thick. That's very, very tiny indeed. So, it won't be going around anyone's finger as a symbol of undying love... but it may be a key component in single-photon… » 3/16/08 7:30pm 3/16/08 7:30pm