Chip-Scale Room-Temperature Atomic Magnetometers for Biomedical Measurements

摘要

We describe a portable four-channel array of chip-scale atomic magnetometers in a flexible flying-lead configuration. These microfabricated, uncooled sensors with volumes below 1 cm~3 demonstrate sensitivities around 100 fT/Hz~(1/2) and bandwidths of several hundred hertz. Performance limits are discussed, as the design is easily scalable to different sensor sizes and large arrays. Initial measurements of MCG are cross-validated with SQUID measurements.