Towards a scalable ultrasensitive optomechanical magnetometer

Optomechanical magnetometers have been previously demonstrated to achieve sensitivities comparable to the state-of-the-art magnetometers of comparable size. They combine the ultra-precise cavity optomechanical measurement and magnetostrictive response of terfenol-d. We have achieved reproducible sensitivities of 600 pT/√Hz using a combination of standard photolithography and sputter deposition techniques which provides a pathway for scalable magnetometers for diverse applications.