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Proceedings Paper

Model of a microtoroidal magnetometer
Author(s): S. Forstner; J. Knittel; H. Rubinsztein-Dunlop; W. P. Bowen
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Paper 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.

Paper Details

Date Published: 9 May 2012
PDF: 8 pages
Proc. SPIE 8439, Optical Sensing and Detection II, 84390U (9 May 2012); doi: 10.1117/12.920057
Show Author Affiliations
S. Forstner, The Univ. of Queensland (Australia)
J. Knittel, The Univ. of Queensland (Australia)
H. Rubinsztein-Dunlop, The Univ. of Queensland (Australia)
W. P. Bowen, The Univ. of Queensland (Australia)

Published in SPIE Proceedings Vol. 8439:
Optical Sensing and Detection II
Francis Berghmans; Anna Grazia Mignani; Piet De Moor, Editor(s)

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