Investigation of optical characteristics of magnetic fluids

A numerical method to study the optical feature of the magnetic fluid films is developed with the Monte Carlo method based on the simulated microstructures, which tracks the spread process of ray transmitting through the magnetic fluid film and computes the spectral transmittivity of the magnetic film. Some factors of affecting the spectral transmittivity of magnetic fluid film are investigated, such as the film thickness, the concentration and diameter of magnetic nanoparticles, and strength of externally applied magnetic field.