10.1021/acs.nanolett.9b00900.s001
Julia Michl
Julia
Michl
Jakob Steiner
Jakob
Steiner
Andrej Denisenko
Andrej
Denisenko
André Bülau
André
Bülau
André Zimmermann
André
Zimmermann
Kazuo Nakamura
Kazuo
Nakamura
Hitoshi Sumiya
Hitoshi
Sumiya
Shinobu Onoda
Shinobu
Onoda
Philipp Neumann
Philipp
Neumann
Junichi Isoya
Junichi
Isoya
Jörg Wrachtrup
Jörg
Wrachtrup
Robust and Accurate Electric Field Sensing with Solid
State Spin Ensembles
American Chemical Society
2019
field strength
NV center
Accurate Electric Field
quantum phase estimation
Individual defect centers
vapor cell magnetometers
account room-temperature operation
nanometer scale resolution
measure macroscopic AC
Solid State Spin Ensembles Electron
2019-08-02 19:14:13
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Robust_and_Accurate_Electric_Field_Sensing_with_Solid_State_Spin_Ensembles/9235466
Electron
spins in solids constitute remarkable quantum sensors.
Individual defect centers in diamond were used to detect individual
nuclear spins with a nanometer scale resolution, and ensemble magnetometers
rival SQUID and vapor cell magnetometers when taking into account
room-temperature operation and size. NV center spins can also detect
electric field vectors, despite their weak coupling to electric fields.
Here, we employ ensembles of NV center spins to measure macroscopic
AC electric fields with high precision. We utilize low strain, <sup>12</sup>C enriched diamond to achieve the maximum sensitivity and
tailor the spin Hamiltonian via the proper magnetic field adjustment
to map out the AC electric field strength and polarization and arrive
at refined electric field coupling constants. For high-precision measurements,
we combine classical lock-in detection with aspects from quantum phase
estimation for the effective suppression of technical noise. Eventually,
this enables <i>t</i><sup>–1/2</sup> uncertainty
scaling of the electric field strength over extended averaging periods,
enabling us to reach a precision down to 10<sup>–7</sup> V/μm
for an AC electric field with a frequency of 2 kHz and an amplitude
of 0.012 V/ μm.