一种修正的Marchenko方法从表面反射测量反演层状超材料内部的波场
A modified Marchenko method to retrieve the wave field inside a layered metamaterial from reflection measurements at the surface
摘要：
利用马尔琴科方法，可以从介质在地表的反射响应反演介质内部的波场。迄今为止，这种方法主要应用于天然材料。在本文中，我们扩展了Marchenko方法在超材料中的应用，在低频极限，有效的负本构参数。数值算例表明，该方法对垂直传播的平面波和水平慢度较小的倾斜平面波都有较好的效果。所提出的方法具有潜在的应用，例如在层状材料的无损检测。
英文摘要：
With the Marchenko method it is possible to retrieve the wave field inside a medium from its reflection response at the surface. To date, this method has predominantly been applied to naturally occurring materials. In this paper we extend the Marchenko method for applications in metamaterials with, in the low-frequency limit, effective negative constitutive parameters. We illustrate the method with a numerical example, which shows that the method works well for vertically propagating plane waves and for dipping plane waves with small horizontal slownesses. The proposed method has potential applications for example in non-destructive testing of layered materials.
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