Long-time behavior of PML absorbing boundaries for layered periodic structures

详细信息    查看全文

• 作者：Alexei Deinega ; Ilya Valuev
• 关键词：FDTD ; PML divergence ; Evanescent waves ; Photonic crystals
• 刊名：Computer Physics Communications
• 出版年：2011
• 出版时间：January 2011
• 年：2011
• 卷：182
• 期：1
• 页码：149-151
• 全文大小：494 K

文摘

In this work we consider a special case of the Perfectly Matched Layer (PML) divergence which is observed by the simulation of the planar periodic structures such as photonic crystal slabs or antenna arrays. This divergence is caused by an excitation of long-living artefact evanescent waves in these structures by an incident external pulse. We study the application of the known remedies to this problem: increasing the distance between the structure and PML, employing the κ parameter, employing non-PML absorbers. We also suggest a new simple and effective solution, where the usual PML is backed by an additional absorbing layer.