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American Physical Society, Physical review B, 15(87)

DOI: 10.1103/physrevb.87.155202

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Magnetometry with nitrogen-vacancy ensembles in diamond based on infrared absorption in a doubly resonant optical cavity

Journal article published in 2013 by Yannick Dumeige, Mayeul Chipaux, Vincent Jacques, François Treussart ORCID, Jean-François Roch, Thierry Debuisschert, Victor M. Acosta ORCID, Andrey Jarmola, Kasper Jensen, Pauli Kehayias ORCID, Dmitry Budker ORCID
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This paper is available in a repository.

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Abstract

We propose using an optical cavity to enhance the sensitivity of a magnetometer relying on the detection of the spin state of a high-density nitrogen-vacancy ensemble in diamond using infrared optical absorption. The role of the cavity is to obtain a contrast in the absorption-detected magnetic resonance approaching unity at room temperature. We project an increase in the photon shot-noise limited sensitivity of two orders of magnitude in comparison with a single-pass approach. Optical losses can limit the enhancement to one order of magnitude, which could still enable room-temperature operation. Finally, the optical cavity also allows us to use less pumping power when the cavity is resonant at both the pump and the infrared probe wavelength.