Stanford University and University of Arkansas researchers in the XLab have developed a cost effective, 2dimensional electron gas (2DEG) Hall-effect magnetic field sensor that can operate from direct current to nearly Gigahertz frequencies.
Magnetic field measurements using currently available devices require complex switching circuitry to mitigate the offset and noise present in measurements.
This patented technology is a magnetically actuated photonic crystal sensor system. It utilizes a photonic crystal (PC) coupled to magnetic material which is then mounted on an optical fiber.