Electromagnetic Wave Scattering By An Infinite Cylinder With A Spherical Inclusion

This master's thesis discusses in detail the scattering characteristics of typical electromagnetic wave by canonical particles.By applying an exact analytical or semi-analytical method,a detailed study of electromagnetic(EM)wave scattering by an infinite cylinder with a spherical inclusion is presented.The author's main works and contributions are as follows:1.An elaborate description of some typical EM beams,including Gaussian,HermiteGaussian,Laguerre-Gaussian and zero-order Bessel beams,is introduced.On this basis,the scattering of the above typical EM beams incident on a cylindrical or spherical particle is investigated,by using an analytical solution known as the generalized Lorenz-Mie theory(GLMT)or semi-analytical solution as projection method.The normalized near-surface and internal field intensity distributions are calculated,followed by a concise discussion.2.By expanding the EM fields within different regions in terms of appropriate cylindrical or spherical vector wave functions(VWFs),and by using the expansion expression of spherical VWFs to cylindrical ones,EM boundary conditions over the sphere and cylinder surfaces and projection method,an analytical solution to the Gaussian beam scattering by an infinite cylinder with a spherical inclusion is obtained.Then,the near-field strength distribution is computed and validated by programming with MATLAB.3.By combining the projection method,a semi-analytical solution is presented of extending the scattering of Gaussian beam by an infinite cylinder with a spherical inclusion to the case of an arbitrarily incident EM beam.The near-field strength distribution is evaluated for a Hermite-Gaussian,Laguerre-Gaussian and zero-order Bessel beam,and some scattering properties are briefly analyzed.