Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 47: Quantum Technologies – Sensing II
Q 47.5: Vortrag
Donnerstag, 5. März 2026, 12:00–12:15, P 5
Magnetic Field Imaging in SiC Quantum Microscope — •Ayisha Suhana1,2, Tatiana A. U Svetikova1,2, Christoph Schneider1, Manfred Helm1,2, Andrei N Anisimov1, and Georgy V Astakhov1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2Technische Universitat Dresden, Dresden, Germany
Studying neuronal activity requires detecting ultra-weak, dynamic magnetic fields generated by neural electrical signals. Quantum sensors based on spin defects, specifically NV centers in diamond, have demonstrated applications from action-potential detection to battery-current monitoring and geological mapping. These advances motivate the exploration of wide-bandgap semiconductors, such as silicon carbide (SiC) and hexagonal boron nitride for scalable quantum sensing.
We used silicon vacancy centers in SiC for wide-field magnetic imaging using optically detected magnetic resonance with dual-frequency, microwave-free [1], and time-resolved sensing protocols. The magnetic fields from continuous and pulsed currents in a wire beneath the sample are reconstructed using a Python-based workflow. The quantum silicon carbide microscope achieves a 50 * 50-pixel field of view with 30 *m spatial and 50 ms temporal resolution, enabling magnetic field imaging in current-carrying structures [2], with potential applications in biomedical research.
[1] D. Simin et al., Phys. Rev. X 6, 031014 (2016) [2] A. Suhana et al., arXiv:2509.14888 (2025)
Keywords: wide-field magnetic imaging; bio-magnetic imaging; quantum sensing; neuronal magnetic fields; silicon vacancy centers