An acoustic imaging method for layered non-reciprocal media
| Autor: | Wapenaar, Kees, Reinicke, Christian |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Europhysics Letters 125 (2019) 34003 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1209/0295-5075/125/34003 |
| Popis: | Given the increasing interest for non-reciprocal materials, we propose a novel acoustic imaging method for layered non-reciprocal media. The method we propose is a modification of the Marchenko imaging method, which handles multiple scattering between the layer interfaces in a data-driven way. We start by reviewing the basic equations for wave propagation in a non-reciprocal medium. Next, we discuss Green's functions, focusing functions, and their mutual relations, for a non-reciprocal horizontally layered medium. These relations form the basis for deriving the modified Marchenko method, which retrieves the wave field inside the non-reciprocal medium from reflection measurements at the boundary of the medium. With a numerical example we show that the proposed method is capable of imaging the layer interfaces at their correct positions, without artefacts caused by multiple scattering. Comment: 21 pages, 8 figures |
| Databáze: | arXiv |
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