Vector Magnetic Measurement Based On Directional Scattering Between Polarized Plasmon Wave And Arrayed Nanoparticles

A vector magnetic field sensor based on surface plasmon resonance (SPR) of a 15 degrees tilted fiber Bragg grating (TFBG) and magnetic fluid is proposed and experimentally demonstrated. Both the orientation and the amplitude of the magnetic fields can be determined unambiguously via the wavelength and intensity monitoring of the SPR, which is essentially dominated by the arrayed Fe3O4 nanoparticles over the nanometric-film of fiber surface.