Model of a microtoroidal magnetometer

S. Forstner; J. Knittel; H. Rubinsztein-Dunlop; W. P. Bowen

doi:10.1117/12.920057

9 May 2012 Model of a microtoroidal magnetometer

S. Forstner, J. Knittel, H. Rubinsztein-Dunlop, W. P. Bowen

Proceedings Volume 8439, Optical Sensing and Detection II; 84390U (2012) https://doi.org/10.1117/12.920057
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

Abstract

We present a model of a cavity optomechanical magnetic field sensor based on a microtoroidal resonator. The magnetic field induced expansion of a magnetostrictive material is transduced onto the physical structure of a highly compliant optical microresonator. The resulting motion is read out optically with ultra-high sensitivity. According to our theoretical model sensitivities of up to 750 fT/√ Hz may be possible. The simultaneous presence of high-quality mechanical and optical resonances in microtoroids greatly enhances both the response to the magnetic field and the measurement sensitivity.

Citation Download Citation

S. Forstner, J. Knittel, H. Rubinsztein-Dunlop, and W. P. Bowen "Model of a microtoroidal magnetometer", Proc. SPIE 8439, Optical Sensing and Detection II, 84390U (9 May 2012); https://doi.org/10.1117/12.920057

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