Perfectly Matched Layer Behavior in Negative Refractive Index Materials

被引：44

作者：

Cummer, Steven A. ^{[1
]}

机构：

[1] Duke Univ, Dept Elect & Comp Engn, Durham, NC 27706 USA

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2004年 / 3卷

基金：

美国国家科学基金会;

关键词：

Absorbing boundary condition; negative index material; perfectly matched layer;

D O I：

10.1109/LAWP.2004.833710

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The perfectly matched layer (PML) absorbing boundary condition is shown to be analytically unstable for a material with a bandwidth of negative refractive index. Physically, this is a consequence of the reversed phase and group velocities in such a medium. The instability is inherent in the PML and is not implementation-specific. We derive a modified PML (NIMPML) that is analytically stable in a negative index material (NIM), and we demonstrate its numerical stability in a specific NIMPML implementation.

引用

页码：172 / 175

页数：4

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