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Published on: February 3, 2023
Investigation of optical force on magnetic nanoparticles with magnetic-fluid-filled Fabry-Perot interferometer
Tianjun Yao1, Shengli Pu2,3, Jie Rao1
1College of Science, University of Shanghai for Science and Technology, Shanghai, 200093, China.
Abstract:
The optical force acting on the magnetic nanoparticles (MNPs) is investigated with the magnetic-fluid-filled fiber-optic Fabry-Perot interferometer. The shift of interference spectra is related with the local refractive index variation in the light path, which is assigned to the optical-force-induced outward movement of MNPs. The influence of magnetic fluid's viscosity, ambient temperature, strength and orientation of the externally applied magnetic field on the optical-force-induced MNPs' movement is studied in details. The results of this work provide a further understanding of interaction between light and MNPs and clarify the dynamic micro-processes of MNPs within magnetic fluid under external stimuli. It may have the potentials in the fields of light-controllable magnetic-fluid-based devices and vector magnetic field detection.
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