Magnetic field sensitivity and decoherence spectroscopy of an ensemble of narrow-linewidth nitrogen-vacancy centers close to a diamond surface

Abstract

We perform pulsed optically detected electron spin resonance to measure the DC magnetic field sensitivity and electronic spin coherence time T_2 of an ensemble of near-surface, high-density nitrogen-vacancy (NV) centers engineered to have a narrow magnetic resonance linewidth. Combining pulsed spectroscopy with dynamic nuclear polarization, we obtain the photon-shot-noise-limited DC magnetic sensitivity of 35 nT Hz^{-0.5}. We find that T_2 is controlled by instantaneous diffusion, enabling decoherence spectroscopy on residual nitrogen impurity spins in the diamond lattice and a quantitative determination of their density. The demonstrated high DC magnetic sensitivity and decoherence spectroscopy are expected to broaden the application range for two-dimensional magnetic imaging.

5 pages, 4 figures

References in corpus (11)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature
• A subpicotesla diamond magnetometer
• Magnetic field imaging with NV ensembles
• High sensitivity magnetic imaging using an array of spins in diamond
• Room-temperature manipulation and decoherence of a single spin in diamond
• Magnetic imaging with an ensemble of Nitrogen Vacancy centers in diamond
• Optical polarization of nuclear ensembles in diamond
• High density NV sensing surface created via He^(+) ion implantation of (12)^C diamond
• Relaxometry and dephasing imaging of superparamagnetic magnetite nanoparticles using a single qubit
• Wide-band, nanoscale magnetic resonance spectroscopy using quantum relaxation of a single spin in diamond

Cited by in corpus (6)

• Tutorial: Magnetic resonance with nitrogen-vacancy centers in diamond---microwave engineering, materials science, and magnetometry
• Demonstration of vector magnetic field sensing by simultaneous control of nitrogen-vacancy centers in diamond using multi-frequency microwave pulses
• Determination of local defect density in diamond by double electron-electron resonance
• Spin coherence and depths of single nitrogen-vacancy centers created by ion implantation into diamond via screening masks
• Nitrogen isotope effects on boron vacancy quantum sensors in hexagonal boron nitride
• Estimation of nuclear polarization via discrete measurement of NV center spin evolution