Miniature cavity-enhanced diamond magnetometer

  title={Miniature cavity-enhanced diamond magnetometer},
  author={Georgios Chatzidrosos and Arne Wickenbrock and Lykourgos Bougas and Nathan Leefer and Teng Wu and Kasper Jensen and Yannick Dumeige and Dmitry Budker Johannes Gutenberg-Universitat Mainz Niels Institute and University of Oslo Cnrs and U. Krey Inst.of Molecular Physics and University of Southern California and Berkeley Nuclear Science Division and Lawrence Berkeley National Laboratory},
  journal={arXiv: Quantum Physics},
We present a highly sensitive miniaturized cavity-enhanced room-temperature magnetic-field sensor based on nitrogen-vacancy (NV) centers in diamond. The magnetic resonance signal is detected by probing absorption on the 1042\,nm spin-singlet transition. To improve the absorptive signal the diamond is placed in an optical resonator. The device has a magnetic-field sensitivity of 28 pT/$\sqrt{\rm{Hz}}$, a projected photon shot-noise-limited sensitivity of 22 pT/$\sqrt{\rm{Hz}}$ and an estimated… 

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