We demonstrate a cavity optomechanical magnetometer where the magnetic-field induced expansion of a magnetostrictive material is transduced onto a highly-compliant optical microresonator. The resulting motion is read out optically with nanoTesla per root Hertz sensitivity.
© 2012 OSA
E. Sheridan, S. Forstner, J. Knittel, H. Rubinsztein-Dunlop, and W. P. Bowen, "Cavity Optomechanical Magnetometer," in Imaging and Applied Optics Technical Papers, OSA Technical Digest (online) (Optical Society of America, 2012), paper STu4F.5.
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