Magnetic-based Polydimethylsiloxane Microspheres for Magnetic Field Measurement


Magnetic-based polydimethylsiloxane microspheres (MPMs) are fabricated and its applications for measurement of magnetic field are investigated. The MPMs are prepared by first incorporating the uniformly sized Mn3O4 nanocrystals into polydimethylsiloxane (PDMS) matrix, and then using a self-assembling method to obtain a chain of microspheres on the fiber taper. The MPMs are regarded as optical resonators, demonstrating whispering gallery modes (WGM) with a high Q factor in the 1310 nm band. Experimental results show that the resonance wavelengths of the WGM spectra depend on the strength of the magnetic field since the change in the applied filed cause the mechanical deformation of the MPMs, leading to a shift in the resonant wavelength of the resonator. Using as magnetic field sensors, the performances of the MPMs in terms of sensitivities and measurement ranges have been optimized. Thus, the sensitivity of 101.9 pm/mT and the measurement range up to 8 mT are achieved with a MPM (~270 μm in diameter). Besides, the performance of the MPM after two-week storage is analyzed, showing the excellent long-term stability.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
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Uncontrolled Keywords: Magnetic field measurement,Magnetic fields,Magnetic nanoparticles,Magnetic sensor,Manganese,Nanocrystals,Optical fiber sensor,Optical fiber sensors,Optical resonators,Polymer,Sensitivity,whispering gallery modes,Instrumentation,Electrical and Electronic Engineering
Publication ISSN: 0018-9456
Last Modified: 18 Jul 2024 07:11
Date Deposited: 16 Jun 2022 12:40
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Related URLs: https://ieeexpl ... cument/9792402/ (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2022
Published Online Date: 2022-06-09
Accepted Date: 2022-06-01
Authors: Sun, Bing
Wang, Xinjiang
Ma, Xiaobo
Sun, Zhongyuan
Wang, Zhiqiang
Zhang, Zuxing
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)



Version: Accepted Version

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