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.
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页码：172 / 175
页数：4
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