High-sensitivity chip-scale magnetic field amplitude detection

Reference#: P03620

Magnetic resonance imaging is a very powerful technique that can, for example, map brain and heart activities by recording magnetic fields produced by electrical currents occurring naturally in these organs. This technique requires very sensitive magnetometers that have only been achieved today by using massive, cryogenically cooled superconducting detectors.

APL inventors have developed a silicon-based chip-scale, high-sensitivity, large-dynamic-range, room-temperature sensor with high magnetic sensitivity. The sensor uses the optical and mechanical resonances in the nano-cavity to sense the deformation induced by a magnetic field via the Lorentz force, greatly enhancing both the response to the magnetic field and the measurement sensitivity.

This sensor could be used in small-size and room-temperature magnetoencephalography for neural imaging and brain–computer interface applications (i.e., video games), magnetic geological surveying (i.e., oil exploration), and underwater submarine detection.

Patent Status: U.S. patents pending.

Dr. G. R. Jacobovitz
Phone: (443) 778-9899