Microwave-free wide-field magnetometry using nitrogen-vacancy centers

Microwave-free magnetometry with N-$V$ centers has emerged as a complementary method to traditional techniques when the use of microwaves is impractical, particularly in applications involving metals and biological samples. Integration of this method with imaging capabilities offers the potential for nondestructive probing in a 2D spatial plane, while also capturing temporal dynamics within existing technological constraints. It is evident that the limits of sensitivity have not been fully realized, and improvements may be achieved via faster specialized cameras and advanced color-center fabrication.