• Open Access

Subnanotesla Magnetometry with a Fiber-Coupled Diamond Sensor

R.L. Patel, L.Q. Zhou, A.C. Frangeskou, G.A. Stimpson, B.G. Breeze, A. Nikitin, M.W. Dale, E.C. Nichols, W. Thornley, B.L. Green, M.E. Newton, A.M. Edmonds, M.L. Markham, D.J. Twitchen, and G.W. Morley
Phys. Rev. Applied 14, 044058 – Published 30 October 2020

Abstract

Nitrogen-vacancy centers (NVCs) in diamond are being explored for future quantum technologies, and in particular ensembles of NVC are the basis for sensitive magnetometers. We present a fiber-coupled NVC magnetometer with an unshielded sensitivity of (310±20)pT/Hz in the frequency range of 10–150 Hz at room temperature. This takes advantage of low-strain 12C diamond, lenses for fiber coupling and optimization of microwave modulation frequency, modulation amplitude, and power. Fiber coupling means the sensor can be conveniently brought within 2 mm of the object under study.

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  • Received 3 March 2020
  • Revised 11 September 2020
  • Accepted 14 September 2020

DOI:https://doi.org/10.1103/PhysRevApplied.14.044058

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & Technology

Authors & Affiliations

R.L. Patel1,2,*, L.Q. Zhou1, A.C. Frangeskou1,†, G.A. Stimpson1,2, B.G. Breeze1,3, A. Nikitin1,‡, M.W. Dale1,§, E.C. Nichols1, W. Thornley1, B.L. Green1, M.E. Newton1,2, A.M. Edmonds4, M.L. Markham4, D.J. Twitchen4, and G.W. Morley1,2,¶

  • 1Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
  • 2EPSRC Centre for Doctoral Training in Diamond Science and Technology, University of Warwick, Coventry CV4 7AL, United Kingdom
  • 3Spectroscopy RTP, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
  • 4Element Six Innovation, Fermi Avenue, Harwell Oxford, Didcot OX11 0QR Oxfordshire, United Kingdom

  • *rajesh.patel@warwick.ac.uk
  • Current address: Lightbox Jewelry, Orion House, 5 Upper St. Martin’s Lane, London WC2H 9EA, United Kingdom.
  • Current address: School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom.
  • §Current address: De Beers Group Technology, Belmont Rd, Maidenhead SL6 6JW, United Kingdom.
  • gavin.morley@warwick.ac.uk

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Vol. 14, Iss. 4 — October 2020

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