Mainz 2017 – scientific programme
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A: Fachverband Atomphysik
A 27: Laser Applications: Optical Measurement Technology (with Q)
A 27.3: Talk
Thursday, March 9, 2017, 11:45–12:00, P 5
Miniature cavity-enhanced diamond magnetometer — •Georgios Chatzidrosos1, Arne Wickenbrock1, Lykourgos Bougas1, Nathan Leefer2, Teng Wu1, Kasper Jensen3, Yannick Dumeige4, and Dmitry Budker1,2,5,6 — 1Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany — 2Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 Copenhagen, Denmark — 3CNRS, UMR 6082 FOTON, Enssat, 6 rue de Kerampont, CS 80518, 22305 Lannion cedex, France — 4Helmholtz Institut Mainz, 55099 Mainz, Germany — 5Department of Physics, University of California, Berkeley, CA 94720-7300, USA — 6Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
We present a 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. The enhanced absorption of the infrared light gives an improved signal contrast greater than 13% at room temperature. Based on this, we demonstrate a magnetic-field sensitivity of 120 pT/√Hz, and a projected a photon shot-noise-limited sensitivity of 12 pT/√Hz for the amount of infrared light collected, while the quantum projection-noise-limited sensitivity for our sensing volume of ∼390µm × 1200 µm2 is estimated to be 0.7 pT/√Hz