Physics – Condensed Matter – Materials Science
Scientific paper
2009-03-19
Phys.Rev.B80:115202,2009
Physics
Condensed Matter
Materials Science
Accepted by PRB (July 29, 2009), 24 pages, 10 figures, 3 tables
Scientific paper
10.1103/PhysRevB.80.115202
Nitrogen-vacancy (NV) centers in millimeter-scale diamond samples were produced by irradiation and subsequent annealing under varied conditions. The optical and spin relaxation properties of these samples were characterized using confocal microscopy, visible and infrared absorption, and optically detected magnetic resonance. The sample with the highest NV- concentration, approximately 16 ppm = 2.8 x 10^{18} cm^{-3}, was prepared with no observable traces of neutrally-charged vacancy defects. The effective transverse spin relaxation time for this sample was T2* = 118(48) ns, predominately limited by residual paramagnetic nitrogen which was determined to have a concentration of 52(7) ppm. Under ideal conditions, the shot-noise limited sensitivity is projected to be ~150 fT/\sqrt{Hz} for a 100 micron-scale magnetometer based on this sample. Other samples with NV- concentrations from .007 to 12 ppm and effective relaxation times ranging from 27 to 291 ns were prepared and characterized.
Acosta Monica Vazquez
Barclay Paul E.
Bauch Erik
Beausoleil Raymond G.
Budker Dmitry
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