Ramsey Envelope Modulation in NV Diamond Magnetometry
- URL: http://arxiv.org/abs/2205.02387v1
- Date: Thu, 5 May 2022 01:19:26 GMT
- Title: Ramsey Envelope Modulation in NV Diamond Magnetometry
- Authors: Jner Tzern Oon, Jiashen Tang, Connor A. Hart, Kevin S. Olsson, Matthew
J. Turner, Jennifer M. Schloss and Ronald L. Walsworth
- Abstract summary: Nitrogen-vacancy (NV) spin ensembles in diamond provide an advanced magnetic sensing platform.
We derive the $15$NV Ramsey response to a misaligned bias field, using a simple vector description of the effective magnetic field on the nuclear spin.
We demonstrate that double-quantum coherences of the NV $S=1$ electronic spin states dramatically suppress these envelope modulations.
- Score: 1.1545092788508224
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Nitrogen-vacancy (NV) spin ensembles in diamond provide an advanced magnetic
sensing platform, with applications in both the physical and life sciences. The
development of isotopically engineered $^{15}$NV diamond offers advantages over
naturally occurring $^{14}$NV for magnetometry, due to its simpler hyperfine
structure. However, for sensing modalities requiring a bias magnetic field not
aligned with the sensing NV axis, the absence of a quadrupole moment in the
$^{15}$N nuclear spin leads to pronounced envelope modulation effects in
time-dependent measurements of $^{15}$NV spin evolution. While such behavior in
spin echo experiments are well studied, analogous effects in Ramsey
measurements and the implications for magnetometry remain under-explored. Here,
we derive the modulated $^{15}$NV Ramsey response to a misaligned bias field,
using a simple vector description of the effective magnetic field on the
nuclear spin. The predicted modulation properties are then compared to
experimental results, revealing significant magnetic sensitivity loss if
unaddressed. We demonstrate that double-quantum coherences of the NV $S=1$
electronic spin states dramatically suppress these envelope modulations, while
additionally proving resilient to other parasitic effects such as strain
heterogeneity and temperature shifts.
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