Abstract
We demonstrate a spin-based, all-dielectric electrometer based on an ensemble of nitrogen-vacancy () defects in diamond. An applied electric field causes energy-level shifts symmetrically away from the 's degenerate triplet states via the Stark effect; this symmetry provides immunity to temperature fluctuations allowing for shot-noise-limited detection. Using an ensemble of , we demonstrate shot-noise-limited sensitivities approaching 1 (V/cm)/ under ambient conditions, at low frequencies ( Hz), and over a large dynamic range (20 dB). A theoretical model for the ensemble of fits well with measurements of the ground-state electric susceptibility parameter . Implications of spin-based, dielectric sensors for micron-scale electric-field sensing are discussed.
- Received 7 December 2016
DOI:https://doi.org/10.1103/PhysRevA.95.053417
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