Optical magnetic field sensors based on nanodielectrics: From biomedicine to IoT‐based energy internet

Smart sensors with excellent performance are accelerating the development of biomedicine and Internet Energy. Nanodielectrics exhibit unique electrical mechanical properties. As predominant materials in optical magnetic field sensor (MFS), they can not only exert anti-interference sensing, but improve measuring characteristics sensors. For instance, fibre quantum probe for obtain a higher sensitivity 0.57 nT/Hz1/2, while measurement range that uses Co-doped ZnO nanorods as cladding is 17–180 mT. Here, these exciting recent achievements realm sensing methods detection reviewed, focus on nanodielectrics, which provide an emerging opportunity to achieve wider MFS.