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An FFT-accelerated direct solver for electromagnetic scattering from penetrable axisymmetric objects. (arXiv:1810.07067v1 [math.NA])
来源于:arXiv
Fast, high-order accurate algorithms for electromagnetic scattering from
axisymmetric objects are of great importance when modeling physical phenomena
in optics, materials science (e.g. meta-materials), and many other fields of
applied science. In this paper, we develop an FFT-accelerated separation of
variables solver that can be used to efficiently invert integral equation
formulations of Maxwell's equations for scattering from axisymmetric penetrable
(dielectric) bodies. Using a standard variant of M\"uller's integral
representation of the fields, our numerical solver rapidly and directly inverts
the resulting second-kind integral equation. In particular, the algorithm of
this work (1) rapidly evaluates the modal Green's functions, and their
derivatives, via kernel splitting and the use of novel recursion formulas, (2)
discretizes the underlying integral equation using generalized Gaussian
quadratures on adaptive meshes, and (3) is applicable to geometries containing
edges. Several 查看全文>>