New interior transmission problem applied to a single Floquet–Bloch mode imaging of local perturbations in periodic media
New interior transmission problem applied to a single Floquet–Bloch mode imaging of local perturbations in periodic media
复制标题
新的内部传输问题应用于周期性介质中局部扰动的单个 Floquet-Bloch 模式成像
DOI:
10.1088/1361-6420/aaecfd
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发表时间:
2019
期刊:
影响因子:
2.1
通讯作者:
Nguyen, Thi-Phong
中科院分区:
文献类型:
--
作者:
Cakoni, Fioralba;Haddar, Houssem;Nguyen, Thi-Phong
This paper considers the imaging of local perturbations of an infinite penetrable periodic layer. A cell of this periodic layer consists of several bounded inhomogeneities situated in a known homogeneous media. We use a differential linear sampling method to reconstruct the support of perturbations without using the Green's function of the periodic layer nor reconstruct the periodic background inhomogeneities. The justification of this imaging method relies on the well-posedeness of a nonstandard interior transmission problem, which until now was an open problem except for the special case when the local perturbation did not intersect the background inhomogeneities. The analysis of this new interior transmission problem is the main focus of this paper. We then complete the justification of our inversion method and present some numerical examples that confirm the theoretical behavior of the differential indicator function determining the reconstructable regions in the periodic layer.
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DOI:
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