Figure 1: Thin Wire Image Cross Section.
Figure 2: Two Parallel Plates Image Cross Section.
This past month proved to fairly busy. As mentioned previously, the paper entitled Electromagnetic Scattering Analysis of Sample Objects Within the Near-Field of a Subwavelength Aperture Utilizing FDTD Methods was presented at the APS-URSI conference in Atlanta, Georgia. Overall, the presentation went very well which included a very good response from the audience. The one area of concern with the current FDTD code involves the two parallel plate sample. As seen in the figures below, the 2 plate sample is asymmetric. At this point, it is believed that the asymmetry is due to the Higdon absorbing boundary conditions. By either pulling the boundary further away from the sample while also keeping the sample symmetrically placed within the boundaries, it is believed that this problem can be remedied. Alternatively, a better boundary condition can be utilized. To this end, in order to facilitate a more generalized code, a uniaxial PML (perfectly matched layer) absorbing boundary condition will be implemented.