Ultrasensitive optomechanical magnetometry.

Forstner, Stefan; Sheridan, Eoin; Knittel, Joachim; Humphreys, Christopher L; Brawley, George A; Rubinsztein-Dunlop, Halina; Bowen, Warwick P · Adv Mater · 2014

basic_science · Level V

Where this comes from

Abstract

A cavity optomechanical magneto-meter operating in the 100 pT range is reported. The device operates at earth field, achieves tens of megahertz bandwidth with 60 μm spatial resolution and microwatt optical-power requirements. These unique capabilities may have a broad range of applications including cryogen-free and microfluidic magnetic resonance imaging (MRI), and investigation of spin-physics in condensed matter systems.