2009/12/29 by Edwin Kim, Victor M. Acosta, Kim, Edwin +9
Engineering · Materials Science · Physics and Astronomy · #Diamond and Carbon-based Materials Research #Force Microscopy Techniques and Applications #Magneto-Optical Properties and Applications #quant-ph
paper · pdf · doi:10.48550/arxiv.0912.5267
14 pages, 4 figures
arxiv created 2012/08/09 · arxiv updated 2012/08/10
A high-nitrogen-concentration diamond sample was subject to 200-keV electron irradiation using a transmission electron microscope. The optical and spin-resonance properties of the nitrogen-vacancy (NV) color centers were investigated as a function of the irradiation dose up to 6.4×1021 e-/cm2. The microwave transition frequency of the NV- center was found to shift by up to 0.6% (17.1 MHz) and the linewidth broadened with increasing electron-irradiation dose. Unexpectedly, the measured magnetic sensitivity is best at the lowest irradiation dose, even though the NV concentration increases monotonically with increasing dose. This is in large part due to a sharp reduction in optically-detected spin contrast at higher doses.