Broadband magnetometry by infrared-absorption detection of nitrogen-vacancy ensembles in diamond

Journal Article · Mon Oct 25 00:00:00 EDT 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3507884· OSTI ID:21464540

Acosta, V M; Bauch, E; Jarmola, A; Zipp, L J; Ledbetter, M P ^[1]; Budker, D ^[1]

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1. Department of Physics, University of California, Berkeley, California 94720 (United States)

We demonstrate magnetometry by detection of the spin state of high-density nitrogen-vacancy ensembles in diamond using optical absorption at 1042 nm. With this technique, measurement contrast, and collection efficiency can approach unity, leading to an increase in magnetic sensitivity compared to the more common method of collecting red fluorescence. Working at 75 K with a sensor with effective volume 50x50x300 {mu}m{sup 3}, we project photon shot-noise limited sensitivity of 5 pT in one second of acquisition and bandwidth from dc to a few megahertz. Operation in a gradiometer configuration yields a noise floor of 7 nT{sub rms} at {approx}110 Hz in one second of acquisition.

• OSTI ID: 21464540
• Journal Information: Applied Physics Letters, Vol. 97, Issue 17; Other Information: DOI: 10.1063/1.3507884; (c) 2010 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
ABSORPTION
CRYSTALS
DIAMONDS
FLUORESCENCE
INFRARED SPECTRA
MAGNETIC FIELDS
NITROGEN
NOISE
OPERATION
PHOTONS
SENSITIVITY
SENSORS
SPIN
VACANCIES
ANGULAR MOMENTUM
BOSONS
CARBON
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
LUMINESCENCE
MASSLESS PARTICLES
MINERALS
NONMETALS
PARTICLE PROPERTIES
PHOTON EMISSION
POINT DEFECTS
SORPTION
SPECTRA