Cheaper magnetic sensors could transform medical imaging and navigation
Researchers have demonstrated that silicon carbide—a material already used in the semiconductor industry—can detect magnetic fields with high precision at room temperature. The breakthrough could enable a new class of compact, affordable sensors for medical diagnostics, quantum computing, and autonomous systems without requiring extreme cooling or expensive equipment.
Originaltitel: Vector Magnetometry Using Silicon Vacancies in 4H-SiC Under Ambient Conditions
<p>Point defects in solids promise precise measurements of various quantities. Especially magnetic field sensing using the spin of point defects has been of great interest recently. When optical readout of spin states is used, point defects achieve optical magnetic imaging with high spatial resolution at ambient conditions. Here, we demonstrate that genuine optical vector magnetometry can be realized using the silicon vacancy in SiC, which has an uncommon S = 3/2 spin. To this end, we develop and experimentally test sensing protocols based on a reference field approach combined with multifrequency spin excitation. Our work suggests that the silicon vacancy in an industry-friendly platform, SiC, has the potential for various magnetometry applications under ambient conditions.</p>