Fig. 5: Proof-of-concept demonstration of the corona current measurement.
From: Picotesla-sensitivity microcavity optomechanical magnetometry
a Schematic of corona current monitoring through magnetic field detection. b Original voltage signal generated by the AFG to simulate the corona current. c Response of the magnetometer with a microdisk radius of 205 μm. The red (blue) curve shows the AC component of the optical transmission with (without) the signal
