截断各向异性等离子体的修正各向异性完全匹配层吸收边界
Modified uniaxial perfectly matched layer absorbing boundary condition for anisotropic dispersion media
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摘要: 基于磁化等离子体本构方程，提出了一种截断各向异性色散介质的修正的各向异性完全匹配层(M-UPML)吸收边界算法。通过等效相对介电常数，将UPML推广到截断各向异性等离子体介质的情形，并推导了其时域有限差分方法(FDTD)迭代式。用该方法计算了半空间磁化与非磁化等离子体的反射系数，计算结果与解析解相一致，表明该吸收边界具有良好的吸收效果。Abstract: Based on the magnetized plasma constitutive equation, a modified uniaxial perfectly matched layer (M-UPML) absorbing boundary condition (ABC) for anisotropic dispersion media is proposed. The UPML is extended to intercept anisotropic dispersion media through the equivalent relative permittivity. M-UPML finite-difference time-domain method (FDTD) iteration formulas are deduced. Half-space reflection coefficients of nonmagnetic and magnetized plasmas are computed. The results are in agreement with the analytic solutions, and show that the M-UPML ABC has good absorption effect.
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