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>Uniaxial PML absorbing boundary condition for truncating the boundary of DNG metamaterials
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Uniaxial PML absorbing boundary condition for truncating the boundary of DNG metamaterials
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机译:截断DNG超材料的边界的单轴PML吸收边界条件
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摘要
The conventional perfectly matched layer (PML) absorbing boundary condition is shown to be unstable when it is extended to truncate the boundary of the double negative (DNG) medium. It is a consequence of the reverse directions of the Poynting and phasevelocity vectors of plane waves propagating in such material. In this paper, a modified uniaxial PML (UPML), which is stable for the DNG medium, is derived. The auxiliary differential equation technique is introduced to derive the discrete field-update equations of DNG-UPML. Numerical results demonstrate the effectiveness and stability of the new UPML for the DNG medium.
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