Quantum sensors embedded in MEMS devices detect bending stress in real time

Researchers at Tohoku University integrated nitrogen vacancy centers—quantum defects in diamond—directly into MEMS cantilevers to detect mechanical stress. These NV centers respond to vibrations, bending, and temperature changes via optically detected magnetic resonance, eliminating the need for separate external sensors and enabling smaller, more efficient devices with real-time stress monitoring.

The quantum sensor is formed as part of the MEMS fabrication process itself. In other words, the mechanical structure and the sensing function are integrated into a single diamond device.