Optomechanical magnetometry with a macroscopic resonator
Quantum Physics
2016-04-20 v1 Optics
Abstract
We demonstrate a centimeter-scale optomechanical magnetometer based on a crystalline whispering gallery mode resonator. The large size of the resonator allows high magnetic field sensitivity to be achieved in the hertz to kilohertz frequency range. A peak sensitivity of 131 pT per root Hz is reported, in a magnetically unshielded non-cryogenic environment and using optical power levels beneath 100 microWatt. Femtotesla range sensitivity may be possible in future devices with further optimization of laser noise and the physical structure of the resonator, allowing applications in high-performance magnetometry.
Cite
@article{arxiv.1510.00795,
title = {Optomechanical magnetometry with a macroscopic resonator},
author = {Changqiu Yu and Jiri Janousek and Eoin Sheridan and David L. McAuslan and Halina Rubinsztein-Dunlop and Ping Koy Lam and Yundong Zhang and Warwick P. Bowen},
journal= {arXiv preprint arXiv:1510.00795},
year = {2016}
}