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Miniature Cavity-Enhanced Diamond Magnetometer

MetadataDetails
Publication Date2017-10-27
JournalPhysical Review Applied
AuthorsGeorgios Chatzidrosos, Arne Wickenbrock, Lykourgos Bougas, Nathan Leefer, Teng Wu
InstitutionsCentre National de la Recherche Scientifique, Lawrence Berkeley National Laboratory
Citations85

We present a highly sensitive miniaturized cavity-enhanced room-temperature\nmagnetic-field sensor based on nitrogen-vacancy (NV) centers in diamond. The\nmagnetic resonance signal is detected by probing absorption on the 1042\,nm\nspin-singlet transition. To improve the absorptive signal the diamond is placed\nin an optical resonator. The device has a magnetic-field sensitivity of 28\npT/$\sqrt{\rm{Hz}}$, a projected photon shot-noise-limited sensitivity of 22\npT/$\sqrt{\rm{Hz}}$ and an estimated quantum projection-noise-limited\nsensitivity of 0.43 pT/$\sqrt{\rm{Hz}}$ with the sensing volume of $\sim$ 390\n$\mu$m $\times$ 4500 $\mu$m$^{2}$. The presented miniaturized device is the\nbasis for an endoscopic magnetic field sensor for biomedical applications.\n