Bonn 2025 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 62: Poster – Quantum Information Technologies (joint session Q/QI)
Q 62.17: Poster
Thursday, March 13, 2025, 17:00–19:00, Tent
Flex-PCB Integrated Quantum Sensor With NV Centers in Diamond (FleQS) — •Jens Pogorzelski1, Jonas Homrighausen2, Ludwig Horsthemke1, Ann-Sophie Bülter1, Frederik Hoffmann1, Dennis Stiegekötter1, Markus Gregor2, and Peter Glösekötter2 — 1Department of Electrical Engineering and Computer Science, FH Münster — 2Department of Engineering Physics, FH Münster
The utilisation of nitrogen-vacancy (NV) centers in diamond microcrystals for quantum magnetometry represents a promising approach for the development of sensitive, integrated magnetic field sensors [1]. Nevertheless, the cost and complexity of the technology have thus far limited its application. This study presents the most compact, fully integrated quantum sensor based on LED excitation, which represents an evolution of previous designs [2]. The sensor integrates all essential components, including a pump light source, photodiode, microwave antenna, optical filters and fluorescence detection, in a compact system that requires no external optical adjustments. The assembly is constructed on a flexible, foldable printed circuit board with surface-mounted components and a laser-cut optical filter. The PCB is folded and moulded. Furthermore, the random alignment of the NV axes is determined. The result is a 3.8x3.1 mm sensor head with a sensitivity of 68 nT/Hz^1/2, representing a miniaturization of quantum magnetometers.
[1] Stürner, F.M. et al., 2021. Advanced Quantum Technologies 4.
[2] Pogorzelski, J. et al., 2024. Sensors 24, 743.
Keywords: Quantum Magnetometry; Miniaturized Quantum Sensor; Integrated Magnetic Field Sensor; Optically Detected Magnetic Resonance (ODMR); Nitrogen-Vacancy Centers