利用填充磁流体的法布里-珀罗干涉仪研究磁性纳米颗粒上的光力。

Yao Tianjun, Pu Shengli, Rao Jie, Zhang Jianming

College of Science, University of Shanghai for Science and Technology, Shanghai, 200093, China.

Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, 200093, China.

Sci Rep. 2018 Aug 17;8(1):12352. doi: 10.1038/s41598-018-30092-7.

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.

利用填充磁流体的光纤法布里-珀罗干涉仪研究了作用于磁性纳米颗粒（MNPs）的光力。干涉光谱的位移与光路中局部折射率的变化有关，这归因于光力引起的MNPs向外移动。详细研究了磁流体的粘度、环境温度、外加磁场的强度和方向对光力诱导的MNPs运动的影响。这项工作的结果有助于进一步理解光与MNPs之间的相互作用，并阐明外部刺激下磁流体中MNPs的动态微观过程。它在基于光控磁流体的器件和矢量磁场检测领域可能具有应用潜力。