Accurate PMCHWT Solutions for Scattering from Arbitrarily-Shaped Penetrable Bodies of Revolution [Open Problems in CEM]

This paper describes the differences between Wu´s PMCHWT procedure as compared to the other surface integral-equation (SIE) techniques in treating scattering from a penetrable body of revolution (BOR) with various permittivity materials. Numerical examples presented indicate that it is indeed accurate for penetrable bodies of revolution with high/low contrast and negative-permittivity materials. Its Method-of-Moments (MoM) matrix is also well conditioned for a wide frequency range from near-resonant frequencies to very low frequencies. There is no need for any preconditioning. Furthermore, it is more efficient and advantageous than the other surface integral-equation techniques with RWG-basis-function discretizations for assessing the light-scattering characteristics of nano-metallic particles or red blood cells, i.e., penetrable bodies of revolutions with resonant sizes at optical frequencies.