Scientists Capture Shadow Cast By 1 Atom
slew writes "Scientist at Griffith University have shown the first absorption image of a single atom isolated in a vacuum. A single atomic ion was confined in an RF Paul trap and the absorption imaged at near wavelength resolution with a phase Fresnel lens. They predict this absorption imaging technique should prove useful in quantum information processing and using the minimum amount of illumination for bio-imaging of light-sensitive samples. Here's a pointer to the paper."
Radio Frequency Paul trap, also known as an ion trap, is named after its inventor Wolfgang Paul. But thanks for derailing the discussion.
For those interested, it was actually - Ytterbium