Mainz 2017 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 43: Laser Applications: Optical Measurement Technology
Q 43.4: Talk
Thursday, March 9, 2017, 12:00–12:15, P 5
Microwave-free magnetometry with nitrogen-vacancy centers in diamond — •Huijie Zheng1,2, Arne Wickenbrock1,2, Lykourgos Bougas1,2, Nathan Leefer1,2, Samer Afach2, Andrey Jarmola3, Victor. M Acosta4, and Dmitry Budker1,2,3,5 — 1Johannes Gutenberg-Universitaet Mainz, 55128 Mainz, Germany — 2Helmholtz Institut Mainz, 55128 Mainz, Germany — 3University of California, Berkeley, CA 94720-7300, USA — 4University of New Mexico, Center for High Technology Materials, Albuquerque, NM 87106, USA — 5Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
We demonstrate a method of all-optical magnetometry by using magnetic-field-dependent features in the photoluminescence of negatively charged nitrogen-vacancy centers. In particular, our method relies on the level anti-crossing (LAC) in the triplet ground state at 102.4mT without the requirement of microwaves. Firstly, we present a magnetometer with a demonstrated noise floor of 6 nT/√Hz. Secondly, we show how the sensitivity is improved by implementing a more dilute diamond sample with a smaller linewidth of the LAC feature in a more homogeneous background field. The technique presented here removes the microwave requirements for magnetometry with NV centers which makes the scheme potentially useful in applications where the sensor is placed close to conductive materials.