Multipulse Double-Quantum Magnetometry With Near-Surface Nitrogen Vacancy Centers

Abstract

We discuss multipulse magnetometry that exploits all three magnetic sublevels of the S=1 nitrogen-vacancy center in diamond to achieve enhanced magnetic field sensitivity. Based on dual frequency microwave pulsing, the scheme works in arbitrary magnetic bias fields and is twice as sensitive to ac magnetic fields as conventional two-level magnetometry. We derive the spin evolution operator for dual frequency microwave excitation and show its effectiveness for double-quantum state swaps. Using multipulse sequences of up to 128 pulses under optimized conditions, we show enhancement of the SNR by up to a factor of 2 in detecting NMR statistical signals, with a 4 times enhancement theoretically possible.

main text: 14 pages plus 4 pages figures (all in one pdf file); Supplementary material 13 pages, typos corrected in matrices on p. 6

References in corpus (6)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Scanning magnetic field microscope with a diamond single-spin sensor
• Engineering shallow spins in diamond with nitrogen delta-doping
• Imaging mesoscopic nuclear spin noise with a diamond magnetometer
• The role of spin noise in the detection of nanoscale ensembles of nuclear spins

Cited by in corpus (2)

• Proton magnetic resonance imaging with a nitrogen-vacancy spin sensor
• Three-dimensional localization of spins in diamond using 12C implantation