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Optimizing chemical-vapor-deposition diamond for nitrogen-vacancy center ensemble magnetometry

S. T. Alsid

S.M. thesis, Department of Nuclear Science and Engineering, Massachusetts Institute of Technology (2017)

Abstract

The nitrogen-vacancy (NV) center in diamond has emerged as a promising platform for high-sensitivity, vector magnetic field detection and high spatial resolution magnetic-field imaging due to its unique combination of optical and spin properties. NV diamond magnetometry has enabled a wide array of applications from the noninvasive measurement of a single neuron action potential to the mapping [mu]T-fields in [mu]m-size meteorite grains. To further improve the magnetic sensitivity of an ensemble NV magnetometer, the growth and processing of the host diamond must be taken into account. This thesis presents a systematic study of the effects of diamond processing on bulk chemical-vapor-deposition diamond. In particular, NV charge-state composition and spin decoherence times are measured for diamonds irradiated with 1 MeV electrons at doses of 1×1015-5×1019 e-/cm2 and thermally annealed at temperatures of 850°C and 1250°C. The study provides an optimal range for diamond processing and shows the quenching of the NV center at high irradiation dosage from the creation of additional vacancy-related defects.

BibTeX

@MastersThesis{Alsid17t, author = {Alsid, Scott T}, school = {Massachusetts Institute of Technology}, title = {Optimizing chemical-vapor-deposition diamond for nitrogen-vacancy center ensemble magnetometry}, year = {2017}, type = {S.M. thesis, Department of Nuclear Science and Engineering}, url = {http://hdl.handle.net/1721.1/112367}, }