Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 5: Magnetometry
Q 5.3: Talk
Monday, March 11, 2024, 11:45–12:00, HS 1221
Integrated magnetic field camera based on diamond NV center infrared absorption ODMR — •Julian M. Bopp1,2, Hauke Conradi3, Felipe Perona2, Anil Palaci1, Jonas Wollenberg1, Thomas Flisgen2, Armin Liero2, Heike Christopher2, Norbert Keil3, Wolfgang Knolle4, Andrea Knigge2, Wolfgang Heinrich2, Moritz Kleinert3, and Tim Schröder1,2 — 1Department of Physics, Humboldt-Universität zu Berlin, 12489 Berlin, Germany — 2Ferdinand-Braun-Institut gGmbH, Leibniz-Institut für Höchstfrequenztechnik, 12489 Berlin, Germany — 3Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut, 10587 Berlin, Germany — 4Leibniz-Institut für Oberflächenmodifizierung e.V., 04318 Leipzig, Germany
Magnetic field sensors based on diamond nitrogen vacancy (NV) centers reveal outstanding sensitivities at room temperature. Such sensors are attractive for biological applications. Nowadays, multiple sensor types can be distinguished. While fiber-packaged sensors are small, hand-held devices, they cannot record magnetic field images. However, scanning magnetometers and camera-based approaches require bulky optics or moving parts, which render photonic packaging impossible.
In our work, we combine the advantages of fiber-packaged and imaging magnetometers. We propose and demonstrate a chip-integrated, fiber-packaged multi-pixel magnetic field camera (patents US11719765B2, EP4099041A1). The camera employs perpendicularly intersecting infrared and green laser beams to perform spatially resolved ODMR in a diamond substrate.
Keywords: NV center; magnetometry; imaging; sensing; diamond