First magnetic-field sensing with 100% optical contrast using an NV-diamond laser system

https://www.eurekalert.org/news-releases/1148883

Summary: Nitrogen-vacancy diamond laser systems achieve 100% optical contrast magnetic field sensing by combining stimulated emission with optical cavity resonance dynamics. Enclosing diamond quantum sensors within resonant cavities amplifies spin-dependent optical signals to maximum physical limits without background fluorescence noise. This total optical contrast detection mechanism advances compact quantum magnetometers for biomedical neural imaging and navigation devices.