Functionalization of Single-Crystal Diamond by Excimer Laser: Creation of NV Centers and Surface Nanoablation

Le résumé fourni par la source

Abstract The possibility of generating nitrogen-vacancy (NV) centers in diamond under prolonged exposure of the crystal surface to nanosecond UV pulses (193 nm and 248 nm, 20 ns) is demonstrated for the first time. The graphitization threshold (33 J/cm2) of a CVD diamond crystal was determined for the KrF laser, and the rates of surface nanoablation (photo-oxidative) etching developing below this threshold were measured. The dependencies of the NV center photoluminescence signal intensity on the number of laser pulses and energy density under KrF laser exposure were investigated. A 17-fold enhancement of the NV0 line intensity was obtained after laser exposure at a wavelength of 248 nm with an energy density of 25 J/cm2.

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