Magnetic field sensing based on V-shaped groove filled with magnetic fluids

A magnetic field sensing system based on V-shaped groove filled with magnetic fluids is developed in this work. The propagation direction of the emergent light after the V-shaped groove (or the position of the emergent light on the detecting plane) is related to the strength of the externally applie...

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Bibliographic Details
Published in:Applied optics (2004) 2012-03, Vol.51 (8), p.1010-1020
Main Authors: Ji, Hongzhu, Pu, Shengli, Wang, Xiang, Yu, Guojun
Format: Article
Language:English
Subjects:
Detection
Exact solutions
Grooves
Magnetic fields
Magnetic fluids
Mathematical analysis
Refractive index
Refractivity
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Summary:A magnetic field sensing system based on V-shaped groove filled with magnetic fluids is developed in this work. The propagation direction of the emergent light after the V-shaped groove (or the position of the emergent light on the detecting plane) is related to the strength of the externally applied magnetic field. The analytical expressions for the sensing system are derived in detail. The sensitivity and other sensing properties of the sensing system are investigated numerically and experimentally. The sensing mechanism is analyzed and ascribed to the magnetically tunable refractive index of magnetic fluids.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.51.001010