Diamond quantum dots fabricated by ion implantation

One possible route to the realization of quantum computing is the use of arrays of quantum dots act as qubits. One method of producing quantum dots is via ion implantation to directly embed foreign atoms into an inert matrix. After annealing, quantum dots of sizes ranging from 1 to 100 nm can be formed. Recently, there has been increased interest in the use of the colour centers in diamond for both single photon sources and to act as the qubits in a quantum computer. Hence there is interest in being able to create arrays of nanocrystalline quantum dots. In this paper we provide the recipe for making nanocrystalline diamond by directly converting the carbon implanted into fused silica into diamond by simple furnace annealing. A scheme is provided by which arrays of single diamond quantum dots could be fabricated.