Model of a Microtoroidal Magnetometer

被引：5
|
作者：
Forstner, S. [1 ]
Knittel, J. [1 ]
Rubinsztein-Dunlop, H. [1 ]
Bowen, W. P. [1 ]
机构：
[1] Univ Queensland, Sch Math & Phys, St Lucia, Qld 4072, Australia
来源：
OPTICAL SENSING AND DETECTION II | 2012年 / 8439卷
关键词：
cavity optomechanics; magnetic field sensors; magnetostriction; integrated microcavity; microtoroid; SPIN; RESONATORS;
D O I：
10.1117/12.920057
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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/root 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.
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页数：8
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