共查询到5条相似文献,搜索用时 0 毫秒
1.
Jianxiong Li Jufeng Dai Peng Wan 《International Journal of Infrared and Millimeter Waves》2007,28(11):1011-1024
Based on the Z-transform method, a simple, efficient and unsplit-field implementation of the Stretched Coordinate Perfectly Matched Layer
(SC-PML) is proposed for truncating the nonlinear dispersive Finite Difference Time Domain (FDTD) lattices. In addition, the
nonlinear FDTD formulations using the Z-transform method are reformulated with the advantage of a simple derivative process. The proposed algorithm is validated
through two numerical examples carried out in one dimensional and two dimensional domains which include Lorentz dispersion
as well as Kerr and Raman nonlinearities. 相似文献
2.
Omar Ramadan 《International Journal of Infrared and Millimeter Waves》2005,26(12):1757-1770
Unconditionally stable formulations of the anisotropic perfectly matched layer (APML) are presented for truncating double
negative (DNG) meta-material finite difference time domain (FDTD) grids. In the proposed formulations, the Z-transform theory
is employed in the alternating direction implicit FDTD (ADI-FDTD) scheme to obtain update equations for the field components
in the DNG meta-material domains. Numerical examples carried out in one dimensional Lorentzian type DNG meta-material domains
are included to show the validity of the proposed formulations. 相似文献
3.
Omar Ramadan 《International Journal of Infrared and Millimeter Waves》2007,28(1):113-119
Unconditionally stable complex envelope (CE) perfectly matched layer (PML) absorbing boundary conditions (ABCs) are presented
for truncating the scalar wave-equation finite difference time domain (WE-FDTD) grids. The formulations are based on incorporating
the alternating direction implicit (ADI) scheme into the CE FDTD implementations of the scalar wave-equation derived in the
PML region at the domain boundaries. Numerical example carried out in two dimensional domain shows that the proposed formulations
are more accurate than the classical ADI scalar wave equation PML formulations when it is used for modelling band limited
electromagnetic applications. 相似文献
4.
5.
The effect of ellipticity on birefringence in a hexagonal photonic crystal fiber having elliptical air holes with Kerr nonlinearity is investigated, with and without defect using finite difference time domain (FDTD) simulations. It is found that the birefringence increases with the increase of ellipticity. Further this analysis is extended to a double defect structure, where two adjacent air holes are omitted horizontally from the hexagonal structure. This double defect structure is found to have more birefringence than the structure without defect. It is raveled that birefringence due to no defect is more for lower value of ellipticity; however at higher value of ellipticity, birefringence due to double defect is more than the one that could be due to no defect. 相似文献