Nutation-Based Longitudinal Sensing Protocols for High-Field NMR With Nitrogen-Vacancy Centers in Diamond
arxiv(2023)
摘要
Nitrogen vacancy (NV) centers in diamond enable nuclear magnetic resonance
(NMR) spectroscopy of samples at the nano- and micron scales. However, at
typical tesla-scale NMR magnetic field strengths, NV-NMR protocols become
difficult to implement due to the challenge of driving fast NV pulse sequences
sensitive to nuclear Larmor frequencies above a few megahertz. We perform
simulations and theoretical analysis of the experimental viability of NV-NMR at
tesla-scale magnetic fields using a new measurement protocol called DRACAERIS
(Double Rewound ACquisition Amplitude Encoded Radio Induced Signal). DRACAERIS
detects the NMR sample's longitudinal magnetization at a much lower driven Rabi
frequency, more suitable technically for NV detection. We discuss how pulse
errors, finite pulse lengths, and nuclear spin-spin couplings affect the
resulting NMR spectra. We find that DRACAERIS is less susceptible to pulse
imperfections and off-resonance effects than previous protocols for
longitudinal magnetization detection. We also identify reasonable parameters
for experimental implementation.
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