20 February 2017 Level anti-crossing magnetometry with color centers in diamond
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Abstract
Recent developments in magnetic field sensing with negatively charged nitrogen-vacancy centers (NV) in diamond employ magnetic-field (MF) dependent features in the photoluminescence (PL) and eliminate the need for microwaves (MW). Here, we study two approaches towards improving the magnetometric sensitivity using the ground-state level anti-crossing (GSLAC) feature of the NV center at a background MF of 102.4 mT. Following the first approach, we investigate the feature parameters for precise alignment in a dilute diamond sample; the second approach extends the sensing protocol into absorption via detection of the GSLAC in the diamond transmission of a 1042nm laser beam. This leads to an increase of GSLAC contrast and results in a magnetometer with a sensitivity of 0.45 nT/√Hz and a photon shot-noise limited sensitivity of 12.2 pT/√Hz.
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Huijie Zheng, Huijie Zheng, Georgios Chatzidrosos, Georgios Chatzidrosos, Arne Wickenbrock, Arne Wickenbrock, Lykourgos Bougas, Lykourgos Bougas, Reinis Lazda, Reinis Lazda, Andris Berzins, Andris Berzins, Florian Helmuth Gahbauer, Florian Helmuth Gahbauer, Marcis Auzinsh, Marcis Auzinsh, Ruvin Ferber, Ruvin Ferber, Dmitry Budker, Dmitry Budker, } "Level anti-crossing magnetometry with color centers in diamond", Proc. SPIE 10119, Slow Light, Fast Light, and Opto-Atomic Precision Metrology X, 101190X (20 February 2017); doi: 10.1117/12.2261160; https://doi.org/10.1117/12.2261160
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