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Recently, we have developed the method of broadband Green's function with low wavenumber extraction (BBGFL) to investigate the problem of arbitrary shaped waveguides [1]. In the past, the Boundary Integral-the Resonant Mode Expansion (BIRME) [2, 3] method was applied to calculate the modes of an arbitrary shaped waveguide with a homogenous dielectric. In BIRME, a DC extraction is applied to remove...
Ultrashort laser interactions with dielectrics are numerically investigated by using a multi-physics approach based on Maxwell's equations coupled with a multiple rate free carrier density equation and with the integrated two-temperature model describing the energy transfer from the conduction band electrons to lattice. The model accounts for a complete Keldysh photoionization rate, impact ionization...
An efficient method for analysis of electromagnetic scattering from three-dimensional objects straddling the interface of a half space has been presented. The analysis of scattering from objects within a half space has been equivalent to the analysis of scattering from composite dielectric objects in free space to enhance the computational efficiency. Different from the traditional method, the Green's...
The propagation of monochromatic electromagnetic waves in metal-dielectric waveguides of simple geometry (circular cylindrical) filled with nonlinear inhomogeneous medium is considered. The Kerr nonlinearity is studied. A physical problem is reduced to solving a nonlinear transmission eigenvalue problem for a system of ordinary differential equations. Eigenvalues of the problem correspond to propagation...
Since the inductance parameter of nonuniform transmission line in anisotropic dielectric is difficult to extract and the tensor dielectric permittivity is hard to solve, a novel method is proposed in this paper to solve this problem. It uses filament division to establish the dispersion model of nonuniform transmission line, and develops the Ampere loop integral dyadic equations and closed circuit...
A single-frequency dielectric model at 1.4 GHz for frozen mineral soils was developed, with the temperature and clay content varying from −1 to −30°C and 9.1 to 41.3%, respectively. The model is based on dielectric measurements of three typical soils (sandy loam, silt loam, and silty clay) collected in the Yamal peninsular. The refractive mixing model was applied to fit the data aggregates consisting...
The computation of scattering from multilayer dielectric bodies is studied by using the combined tangential formulation (CTF) of surface integral solution. Different from homogeneous bodies, the formulation of multilayer dielectric bodies includes the interaction between equivalent currents on different interfaces. The previous preconditioners for solution of homogeneous bodies are not efficient any...
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