Shape identification of anisotropic diffraction gratings for TM-polarized electromagnetic waves |
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Authors: | Dinh-Liem Nguyen |
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Institution: | 1. DEFI, INRIA Saclay–Ile-de-France and Ecole Polytechnique, Palaiseau, France.dnguyen@cmap.polytechnique.fr |
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Abstract: | This paper concerns the shape identification problem of anisotropic periodic structures which are known as diffraction gratings. We study the so-called Factorization method as a tool for reconstructing the anisotropic periodic media from measured spectral data involving scattered electromagnetic waves in TM modes. This sampling method provides a simple criterion to compute a picture of shape of diffraction gratings in a rapid way. We propose a rigorous analysis for the method as well as numerical experiments to examine its performance. |
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Keywords: | diffraction gratings factorization method inverse scattering TM modes |
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