Polynomial modal analysis of slanted lamellar gratings
Résumé
The problem of diffraction by slanted lamellar dielectric and metallic gratings in classical mounting is formulated as an eigenvalue eigenvector problem. The numerical solution is obtained by using the moment method with Legendre polynomials as expansion and test functions which allows to enforce in an exact manner the boundary conditions which determine the eigen-solutions. Our method is successfully validated by comparison with other methods including in the case of highly slanted gratings.
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