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

By V. Acosta, E. Bauch, A. Jarmola, L. Zipp, M. Ledbetter, Dmitry Budker. 2010

146 citations recorded by the source corpus.

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 50×50×300 μm3, 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 nTrms at ∼110 Hz in one second of acquisition.

Subfields: Geophysics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/02d2186a2c5c4b8dfb578d45cd8414a62217627a

How researchers see this paper

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In Geophysics

1. M. Turner
2. R. Walsworth
3. J. Schloss
4. J. Barry
5. C. Hart
6. L. Pham
7. E. Bauch

In Materials Chemistry

1. R. Walsworth
2. M. Turner
3. J. Schloss
4. J. Barry
5. C. Hart
6. L. Pham
7. E. Bauch
8. V. Jacques

Citations in the corpus

• Nitrogen-vacancy centers in diamond: nanoscale sensors for physics and biology. (2014, unknown): “Moreover, by using large ensembles of NV centers in bigger crystals, investigators have achieved detection rates up to megahertz and sensitivities below kHz/ √ Hz (72).”
• Sensitivity optimization for NV-diamond magnetometry (2019, methodology): “…of common-mode noise may include temperature fluctuations, which enter the NV- Hamiltonian via the zerofield splitting parameter D (∂D∂T ≈ −74 kHz/K) (Acosta et al., 2010a; Kucsko et al., 2013; Toyli et al., 2013); axial strain gradients; axial electric fields; and transverse magnetic fields.”
• Magnetometry with nitrogen-vacancy defects in diamond (2013, background): “In this section, we briefly discuss a detection scheme recently introduced by Acosta et al [48], based on the measurements of spindependent IR absorption by an ensemble of NV defects.”
• Subpicotesla Diamond Magnetometry (2014, background): “Nuclear-spin-assisted repetitive readout [26], infrared-absorption-based readout [28], or enhancement by optical cavities [29] are strategies to reach the projection noise limit.”