P. Olivero, B. Fairchild and S.Prawer, University of Melbourne |

Not for Show
The world's smallest diamond ring, measuring 300 nanometers (billionths of a meter) thick and 5 microns (millionths of a meter) across. A diamond is not mounted on a ring: the ring itself is made of diamond. It was made by carving out a circular structure in an artifically made diamond. The ring will be used to access single photons coming out of a tiny impurity region inside the diamond.

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