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

作者：Ji, Hongzhu; Pu, Shengli^*; Wang, Xiang; Yu, Guojun

来源：Applied Optics, 2012, 51(8): 1010-1020.

DOI：10.1364/AO.51.001010

• DEPENDENT REFRACTIVE-INDEX
• CURRENT SENSOR
• FARADAY-ROTATION
• LIGHT
• RELAXATION

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.

• 出版日期2012-3-10
• 单位上海理工大学