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Optomechanical Magnetometry with a Macroscopic Resonator

Yu, Changqiu; Janousek, Jiri; Sheridan, Eoin; McAuslan, David L; Rubinsztein-Dunlop, Halina; Lam, Ping Koy; Zhang, Yundong; Bowen, Warwick


We demonstrate a centimeter-scale optomechanical magnetometer based on a crystalline whispering-gallery-mode resonator. The large size of the resonator, with a magnetic-field integration volume of 0.45  cm3, allows high magnetic-field sensitivity to be achieved in the hertz-to-kilohertz frequency range. A peak sensitivity of 131  pT  Hz−1/2 is reported, in a magnetically unshielded noncryogenic environment using optical power levels beneath 100  μW. Femtotesla-range sensitivity may be possible...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
Source: Physical Review Applied
DOI: 10.1103/PhysRevApplied.5.044007
Access Rights: Open Access


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