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Sensors 2016, 16(12), 2157; doi:10.3390/s16122157

A Photonic Crystal Magnetic Field Sensor Using a Shoulder-Coupled Resonant Cavity Infiltrated with Magnetic Fluid

1
College of Sciene, University of Shanghai for Science and Technology, Shanghai 200093, China
2
Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
3
School of Information Engineering, Hubei University for Nationalities, Enshi 445000, Hubei Province, China
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 17 October 2016 / Revised: 1 December 2016 / Accepted: 13 December 2016 / Published: 16 December 2016
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [3368 KB, uploaded 16 December 2016]   |  

Abstract

A kind of photonic crystal magnetic field sensor is proposed and investigated numerically. The shoulder-coupled resonant cavity is introduced in the photonic crystal, which is infiltrated with magnetic fluid. Through monitoring the shift of resonant wavelength, the magnetic field sensing is realized. According to the designed infiltration schemes, both the magnetic field sensitivity and full width at half maximum increase with the number of infiltrated air holes. The figure of merit of the structure is defined to evaluate the sensing performance comprehensively. The best structure corresponding to the optimal infiltration scheme with eight air holes infiltrated with magnetic fluid is obtained. View Full-Text
Keywords: magnetic fluid; photonic crystal; resonant cavity; magnetic field sensor magnetic fluid; photonic crystal; resonant cavity; magnetic field sensor
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MDPI and ACS Style

Su, D.; Pu, S.; Mao, L.; Wang, Z.; Qian, K. A Photonic Crystal Magnetic Field Sensor Using a Shoulder-Coupled Resonant Cavity Infiltrated with Magnetic Fluid. Sensors 2016, 16, 2157.

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