is the ratio of the refractive index of the particle to that of the surrounding medium. Therefore, in the Rayleigh regime, the scattering efficiency is simply proportional to x4. In the optical scattering regime, Qeff→ ≈ 2. However, in the intermediate regime, the scattering efficiency is seen to oscillate as the size parameter increases.
MOST, RSoft's scanning and optimization utility, was used to automate multiple FullWAVE simulations to produce the Qeff vs. x plot in Figure 4. The quantity σtot is easily computed in FullWAVE using the MultiPlane Far-Field output options; after obtaining σtot, Qeff and x are then generated for Figure 4 using post processing. The MIE theory results presented in Figure 4 were obtained using Phillip Laven's MIE code , which is in turn validated against the Bohren and Huffmann MIE code .
In summary, FullWAVE provides a powerful and accurate method for simulating the Mie problem. The results presented in this application note for scattering from a simple dielectric sphere can be easily extended to more complicated situations, giving users a versatile tool to study a wide variety of applications in atmospheric science, biophotonics, advanced materials, and more.