Bonn 2025 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 63: Poster – Quantum Information (joint session QI/Q)

Q 63.15: Poster

Thursday, March 13, 2025, 17:00–19:00, Tent

Three axis magnetic field control setup for nitrogen-vacancy color center magnetometry — •Ricky-Joe Plate, Jan Thieme, Bernd Bauerhenne, and Kilian Singer — Experimental Physics I, Institute of Physics, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany

Nitrogen-vacancy (NV) centers in diamond provide a promising platform for room-temperature quantum sensing and information processing owing to their unique optical and spin properties and precise fabrication methods allowing for photonic structures such as nano pillars [1]. Precise quantum magnetometry requires an accurate and stable adjustment of the external magnetic field. Our solution incorporates a motorized magnetic system that allows for precise angular alignment relative to the NV-axis and offers adjustable magnetic field strengths. The system is engineered to be highly stable against external disturbances, ensuring consistent and reliable operation over extended measurement periods. Additionally, a custom designed algorithm performs optimal alignment of the magnetic field with regard to the NV center axis.

[1] Schmidt, A., Bernardoff, J., Singer, K., Reithmaier, J.P. and Popov, C. (2019), Fabrication of Nanopillars on Nanocrystalline Diamond Membranes for the Incorporation of Color Centers. Phys. Status Solidi A, 216: 1900233.

Keywords: color centers; nv center; magnetometry