SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 43: QI Poster II (joint session QI/Q)
Q 43.31: Poster
Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof
Fiber-coupled NV Ensembles in Microdiamond as miniaturized Magnetic Field Probes — •Jonas Homrighausen1, Jens Pogorzelski2, Peter Glösekötter2, and Markus Gregor1 — 1Department of Engineering Physics, University of Applied Sciences, Münster, Germany — 2Department of Electrical Engineering and Computer Science, University of Applied Sciences, Münster, Germany
NV centers in diamond are a very promising candidate for precise measurement of magnetic fields. Especially NV ensembles offer the inherent ability for threedimensional reconstruction of the magnetic field vector while being optically adressable in an optically detected magnetic resonance (ODMR) setup. We utilize these properties by coupling NV ensembles in microdiamond to optical fibers in order to create magnetic probes with high spatial resolution. This however poses challenges, amongst which the efficient delivery of microwave exciation to the fiber tip. In this poster, different methods are discussed for this particular application. We use finite element simulations to compare microwave structures and investigate the according ODMR results. Furthermore, we analyse the effect of crystal orientation with respect to locally homogeneous microwave and magnetic fields.