title: Ultrasensitive optomechanical magnetometry.
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.
authors.affiliation: School of Mathematics and Physics, University of Queensland, St Lucia, Queensland, 4072, Australia.
authors.forename: Stefan
authors.initials: S
authors.lastname: Forstner
authors.forename: Eoin
authors.initials: E
authors.lastname: Sheridan
authors.forename: Joachim
authors.initials: J
authors.lastname: Knittel
authors.forename: Christopher L
authors.initials: CL
authors.lastname: Humphreys
authors.forename: George A
authors.initials: GA
authors.lastname: Brawley
authors.forename: Halina
authors.initials: H
authors.lastname: Rubinsztein-Dunlop
authors.forename: Warwick P
authors.initials: WP
authors.lastname: Bowen
keywords: cavity-optomechanics; cyrogen-free; magnetometry; optical sensing; silicon-chip sensing